Fixes Settings tab operations (Load Defaults, Cancel Changes, Save Settings)

Closes-Bug:#1349903

Change-Id: Ia641082d4a5726e5e645d27a47455e5c96fade93
Fixes dependent settings check

Closes-Bug:#1349896

Change-Id: I80430b9b72c0d4dc0d1c8bb7fa4e198e3b9d83c2
Style fix for JA language on node interfaces page.

Closes-Bug:#1350313

Change-Id: I27ae815748e7f7bfe14d052f59350b4cb0a7c251
Deploy secondary controllers in portions

Altering priorities for secondary controllers.
Do not deploy more than 6 secondary controllers
simultaneously or galera will not be able to
digest this amount of slaves for initial state
transfer of the database.

Related-bug: #1350245
Change-Id: I01554a3ad9dac22c655c6f9e97eba4f9444df8ee