OPAL-2647 Index property added to Variable, implemented for various datasources
OPAL-2655 Silently dispose datasources when removing them from datasource registry
OPAL-2612 Compute frequencies of continuous even though there are no intervals
OPAL-2656 Refresh hibernate table entities cache after transaction. Memory leak fixed in hibernate datasource
OPAL-2657 view set is synchronized
OPAL-2656 Entities refresh confuses the transaction
Code clean
Added some error logs when value table reference lookup fails
Merge remote-tracking branch 'upstream/master'
Setting snapshot versions and adding magma related projects to dependencyManagement
Merge branch 'preparing_poms'
adding thehyve snapshots repo to pom.xml