remove empty tab for job edition
remove possibility to add job without interval if start and end date
are provided
show a message when a job is started/stoped
Resolves bug: 1523497
Change-Id: Iff39fc9e813969672eecd48d9084fd100bcf611c
Freezer Dashboard now support the latest version of freezer api.
Minor update in tox.ini to disable old style classes warnings
Change-Id: I6549a7587be1a39fbed280de5543125cfeb16807