Correct misspelled words in Cloud Administrator Guide.

There are two misspelled word in the Object Storage - Replicators
section of Cloud Administrator Guide.  They are in the following
line: "The replicator knowd if replication needs to take plac by
examining hashes."  This patch corrects the misspelling.

Change-Id: Ic914ec64939f403c05e8961b7b222975a5c54b8d
Closes-Bug: #1305211
Merge "Correct misspelled words in Cloud Administrator Guide."