Problems resolved:
- Errors relating to 'etc' folders which did not exist in the
target repositories have been eliminated.
- Some repositories were not being excluded from evaluation
for file/template updates. All appropriate exclusions are
now implemented.
- If an OSA role repository did not have the required folder
to copy rootwrap files into, the copy would fail and the
rootwrap files therefore be left out of the patch.
- When executed on Mac OS X, python2 is not found.
- Documentation is added to describe how to use the script
to handle periodic SHA bumps.
Change-Id: I628cd2c3156d118c17ca2f90d4ccf0bc5a080bbf
e8abf19647