(PUP-1677) Fix tests for PE compatibility

1) A SLES compatibility issue was fixed

2) the reset_agent_ssl helper does not work on PE. A test which relied
on it would fail because it used duplicate certificate names. That
test was updated to use unique certificate names for each cert
request, to avoid duplicate cert issues.
Merge pull request #2371 from branan/fixup_tests_for_pe

(PUP-1677) Fix tests for PE compatibility
Merge remote-tracking branch 'upstream/stable'

* upstream/stable:
  (PUP-1677) Fix tests for PE compatibility