This allows metadata rate limiting tests to run fully,
yet they will be skipped until feature code will be inserted to RHOSO.
The ini filename/location from which configuration pulled and applied
changed in RHOSO, now used instead of 'oc patch' for edpm nodes.
Also service existence check fixed, pointed to strip method instead of
calling it, which mistakenly interpreted as true, so later code included
crc node as node to restart metadata service, results in failure of test.
In metadata rate limiting tests redundant code removed,
and made configuration setting restart service in minimal amounts.
Change-Id: I2b44e2dbf97f87b8fd9b5feee49a634300367218