Updated from global requirements

Change-Id: I28a03b41b34b327ea33d0d5784e842d4d2d9e254
Use doc-tools-check-languages

Use new global language checking script and remove test-languages.sh.

Change-Id: Id954d5b471ba231c85139e7df5d89a478226dc8d
Merge "Use doc-tools-check-languages"
Correct the req and response of creating LB pool

This patch correct the req and response of creating LB pool, and correct
the "subnet_id" as a required parameter of creating LB pool.

Change-Id: I508613ff762f0819bb7e141ef8856cb7b5735c84
Closes-bug: 1342379
Update param information on stack preview

A stack preview doesn't actually create any resources and so, the
'disable_rollback' param is not used at all.  This updates the info for
disable_rollback to make it clear it is there just for consistency with
stack create.

Change-Id: I013bbf64725de08a4062fe521252525d07d3bf04
Merge "Update param information on stack preview"
Fixed the command to install maven on Fedora

Change-Id: Ib08cd16bfd0dc1ea5afefbf61b9a43479bf8d7f9