Add optional comment parameter to transition_issue
Add optional comment parameter to transition_issue

dwmarshall/pycontribs-jira,pycontribs/jira,jameskeane/jira-python,dbaxa/jira,tsarnowski/jira-python,kinow/jira,stevencarey/jira,VikingDen/jira,systemadev/jira-python,awurster/jira,systemadev/jira-python,coddingtonbear/jira,akosiaris/jira,coddingtonbear/jira,awurster/jira,akosiaris/jira,m42e/jira,pycontribs/jira,stevencarey/jira,tsarnowski/jira-python,milo-minderbinder/jira,jameskeane/jira-python,dwmarshall/pycontribs-jira,rayyen/jira,milo-minderbinder/jira,m42e/jira,kinow/jira,dbaxa/jira,VikingDen/jira,rayyen/jira