SPY-115: Rename javadocs to javadoc for IDE compat.

Change-Id: I14c5daff7ad5f386e033283929d50daa46a3babb
Reviewed-on: http://review.couchbase.org/25343
Reviewed-by: Michael Nitschinger <michael.nitschinger@couchbase.com>
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>