Data processing templates tables refactoring

Remove 'data_processing.cluster_templates/_nodegroups_list.html'
and 'data_processing.nodegroup_templates/_processes_list.html'
templates and make corresponding lists at the Cluster Templates
and Node Group Templates tables using standard Column class
attributes.

Closes-Bug: #1356836

Change-Id: I82aa325ed27e06bd4652df7934488e67bd5e514b
Fix action_class typo and exception message.

Change-Id: Ib3628c201957c9ece61091c657bda94ef6af4d28
Imported Translations from Transifex

Change-Id: I95afc74c5b1ec7aa3b8642614c1811e67c30b446
Merge "Fix action_class typo and exception message."
Merge "Data processing templates tables refactoring"
Merge "Imported Translations from Transifex"