Documentation Bug fix committed

I have corrected the spelling mistakes, that were described in the bug.

Change-Id: I53371b9a70651078bf051d6bc384d1107724d39b
Closes-Bug: #1393133
Merge "Documentation Bug fix committed"
Update cinder.conf.sample to fix max db conn retries

Another external library change (oslo.db) has broken the gate
because cinder.conf.sample appears to be out of date.  The change
was just to a message string:

   Maximum number of database connection retries during
   startup. Set to -1 to specify an infinite retry count. (integer value)
   ->
   Maximum db connection retries during startup. Set to -1 to
   specify an infinite retry count. (integer value)

This patch updates cinder.conf.sample to get beyond this failure.  The
Cinder team will be talking about how to avoid these issues in the future.

Change-Id: Ia14954842d141b9bd208ce98c5a70a42b014ac45