Relocate robot standard script tools

Changes:
- Move robot_standards and robot_custom_rules.py
script files to tools directory
- Change permission to executable for scripts

Tested: -

Relocate robot standard script tools

Changes:
- Move robot_standards and robot_custom_rules.py
script files to tools directory
- Change permission to executable for scripts

Tested: - NA
Change-Id: I68754b4ed537df3a3b2985d905e29d50846bdeb7
Signed-off-by: George Keishing <gkeishin@in.ibm.com>

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