Fix JiraVersionCreator already existing detection

Use the expanded version instead the raw string to detect that a version
already exists in JIRA.
One more usage of jiraVersion down

Another case of the non-expanded jiraVersion being used instead of
realVersion
Don't fail on already-released versions
Merge branch 'ignore_already_released'
Add more logs

Added a log on version created and one on version released.
Merge branch 'add_more_logs'

Conflicts:
	src/main/java/hudson/plugins/jira/JiraReleaseVersionUpdater.java
	src/main/java/hudson/plugins/jira/JiraVersionCreator.java