Cleaning up more warnings.

Cleaning up more warnings.

These fixes clear a bit over 200 more of the basic warnings
seen. A few signed/unsigned issues that might require thought
were left for later.

Change-Id: Ie04411927cef8a73f17f16e329f6546229c2c3d1
Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2109
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Sachin Agrawal <sachin.agrawal@intel.com>
Reviewed-by: Ossama Othman <ossama.othman@intel.com>
Reviewed-by: Erich Keane <erich.keane@intel.com>