Clean up keystone-all.rst

This change fixes warnings and errors from
doc/source/man/keystone-all.rst when generating documentation.

Change-Id: Ie33b2600f28c517644730b2371ce34ca2e73b7a5
check for constraint before dropping

Bug 1189633

Change-Id: Ieff57d17f224ec31523bfcce288818a08d64f98a
Merge "check for constraint before dropping"
Merge "Clean up keystone-all.rst"