BAP-172 - Support Bamboo 5.1
Based on Atlassian's feedback, Bamboo version 5.1.0 is buggy and will not load our 'Release Management Tab', reverting my changes so our plugin will be compatible to Bamboo 5.0.x and >=5.1.1 (Bamboo 5.1.0 users will have to upgrade to 5.1.1 or downgrade to 5.0.x).
Also see: https://jira.atlassian.com/browse/BAM-13734