Fix getManagedObjects on ObjectManager returning no objects

Currently, when calling getManagedObjects
```
busctl call xyz.openbmc_project.State.Host \
/xyz/openbmc_project/state/host0 org.freedeskto

Fix getManagedObjects on ObjectManager returning no objects

Currently, when calling getManagedObjects
```
busctl call xyz.openbmc_project.State.Host \
/xyz/openbmc_project/state/host0 org.freedesktop.DBus.ObjectManager \
GetManagedObjects
```
we end up getting no objects `a{oa{sa{sv}}} 0`. This is incorrect
and we technically should return the managed objects.
Looking further at the spec:
```
All returned object paths are children of the object path implementing
this interface, i.e. their object paths start with the ObjectManager's
object path plus '/'.
```
This implies that the the path owned by the object manager should
not be the hostX sub-entries but `/xyz/openbmc_project/state`

Tested by building a harma image and in qemu calling introspect on
each of the object paths and ensuring that we get the correct responses
```
busctl introspect xyz.openbmc_project.State.BMC \
/xyz/openbmc_project/state
busctl introspect xyz.openbmc_project.State.BMC \
/xyz/openbmc_project/state/bmc0
busctl introspect xyz.openbmc_project.State.Host \
/xyz/openbmc_project/state
busctl introspect xyz.openbmc_project.State.Host \
/xyz/openbmc_project/state/host0
busctl introspect xyz.openbmc_project.State.Chassis \
/xyz/openbmc_project/state
busctl introspect xyz.openbmc_project.State.Chassis \
/xyz/openbmc_project/state/chassis0
```
Also tested that we get the correct managed object
```
busctl call xyz.openbmc_project.State.Host /xyz/openbmc_project/state \
org.freedesktop.DBus.ObjectManager GetManagedObjects
busctl call xyz.openbmc_project.State.BMC /xyz/openbmc_project/state \
org.freedesktop.DBus.ObjectManager GetManagedObjects
busctl call xyz.openbmc_project.State.Chassis \
/xyz/openbmc_project/state \
org.freedesktop.DBus.ObjectManager GetManagedObjects
```

Change-Id: I525c8719c326cfbbe568c4f1f7fe95e3aa13c660
Signed-off-by: Amithash Prasad <amithash@meta.com>

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Switch to Use phosphor-dbus-interface defined constants

We are redefining a lot of the constants which are already
defined in the phosphor-dbus-interface auto-generated
headers. This change switches

Switch to Use phosphor-dbus-interface defined constants

We are redefining a lot of the constants which are already
defined in the phosphor-dbus-interface auto-generated
headers. This change switches the code to use those instead
of allowing compile time definition of those.

Allowing for compile time definition would probably break
clients who are not aware of the new paths anyway.

Tested by build a harma image and loading in qemu to test
the added interfaces are unchanged.
```
busctl introspect xyz.openbmc_project.State.BMC \
/xyz/openbmc_project/state/bmc0
busctl introspect xyz.openbmc_project.State.Host \
/xyz/openbmc_project/state/host0
busctl introspect xyz.openbmc_project.State.Chassis \
/xyz/openbmc_project/state/chassis0
```

Change-Id: Ib4c77d2789c13f509b75a2b1837ea454e53e8ae9
Signed-off-by: Amithash Prasasd <amithash@meta.com>

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sdbusplus: use shorter type aliases

The sdbusplus headers provide shortened aliases for many types.
Switch to using them to provide better code clarity and shorter
lines. Possible replacements are

sdbusplus: use shorter type aliases

The sdbusplus headers provide shortened aliases for many types.
Switch to using them to provide better code clarity and shorter
lines. Possible replacements are for:
* bus_t
* exception_t
* manager_t
* match_t
* message_t
* object_t
* slot_t

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I41103c892db258a85640aa1442acd9a295c8a847

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clang-format: update to latest from docs repo

This is from openbmc/docs/style/cpp/.clang-format

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I5b80bb568451706afb6d268b41e1a5357a

clang-format: update to latest from docs repo

This is from openbmc/docs/style/cpp/.clang-format

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I5b80bb568451706afb6d268b41e1a5357a2ca6db

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meson: fix up compile errors found by meson

meson enables more error checking by default so in preperation for
moving to it, fix all errors in the code it has found.

This breaks down into the follo

meson: fix up compile errors found by meson

meson enables more error checking by default so in preperation for
moving to it, fix all errors in the code it has found.

This breaks down into the following issues:
- Unused variables: remove where applicable, otherwise void out
- Extra ';'
- Local includes need to use ""

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I94d9b4d2ffc85ae46d941e1a190fafd4ba5bd893

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Apply clang code format to this state repo

Change-Id: I232af39d8ded90fa3eb37b74d1435ddbf19fffb1
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>

Add base support for BMC state management

This is the starting code needing to
build the application. Still more to do,
this is just the layout for the additional
commits that will be done for the

Add base support for BMC state management

This is the starting code needing to
build the application. Still more to do,
this is just the layout for the additional
commits that will be done for the state
management.

Change-Id: Ief1dc96c84b34630e60ef40c99d4faf5b6f6e02e
Signed-off-by: Josh D. King <jdking@us.ibm.com>

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