Fix concatenation in data processing actions

Remove concatenation and pluralization issues from Delete Job,
Launch Job (incl Launch Job, Launch New Cluster, Choose Plugin,
Relaunch, Relaunch new cluster), Delete Job binary,
Delete Data source, Delete Template, Delete Job execution,
Delete Cluster, Unregister Image, and Delete Template actions.

Change-Id: Idb615f4e2830ea5d9ddd0f871bfb3d90854f45f5
partial-bug: 1307476
Merge "Fix concatenation in data processing actions"