(MCO-311) Remove current directory from Ruby load path

Conflicts:
	bin/mc-call-agent
MCO-336 - update release notes and changelog for 2.5.2
(maint) Update release date
Merge pull request #4 from melissaanne/maint/update_notes_changelog

Maint/update notes changelog
Merge branch 'MCO-311/2.5.1/security_fixes' into stable

* MCO-311/2.5.1/security_fixes:
  (maint) Update release date
  MCO-336 - update release notes and changelog for 2.5.2
  (MCO-311) Remove current directory from Ruby load path