Fixed typos in the QOS Spec forms in Volume Types

Under Admin->Volumes->Volume Types, when we click the 'Create QOS
Spec' button, the Description section mentions 'Manage' instead
of 'Manage Specs'.

Change-Id: Ide4691a79539f2cbf3f94d6f16887eb886f8e23d
Closes-Bug: #1371249
Merge "Fixed typos in the QOS Spec forms in Volume Types"