Align various arrows

To be in alignment with Style Guide
fix negative tests on rspec 2.11
Update Modulefile, CHANGELOG for 2.0.2 release
Adding RPM/RHEL support
RSpec tests for rabbitmq::repo::rhel
Regexp.escape resource names in regexp matches as they may contain characters that also translate to regexp
Cluster support
Fixing clustering config
Allow different cluster node types (such as ram nodes)
fixing typo in config