Fixed doxygen comments in camutex.h
Fixed doxygen comments in camutex.h

Fixed problems with doxygen comments that included a few causing
outright errors and missing functions in the resulting
documentation.

- Removed use of '@' on local names instead of Doxygen keywords
 which were causing errors.

- Prefixed '::' to types and enums that were not recongnized.

- Fixed typo in enum name

- Added missing periods at end of brief/summary prose.

Change-Id: I2731d9d5ebf10f738e387a1922027fb752a8a3be
Signed-off-by: Jon A. Cruz <d4ae605477945a543a3ecda8955c93978db16a84@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/1834
Reviewed-by: Erich Keane <ec9f61fe526c14bb62c55d7c978f025ee6b3583d@intel.com>
Tested-by: jenkins-iotivity <09cb29e8a2b473a2c978382eec13ee06fa017bda@opendaylight.org>

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