Clean up TODOs in OCUtilities

Clean up TODOs in OCUtilities

The Escape String mechanism is no longer used anywhere, so it is
dead code.  The QueryParam parsing was only used in 1 place and the
initial non 'temp patch' function was all dead code.  This fix removes
both sets of dead code and cleans up the temp-patch code to be a little
more efficient.

Change-Id: I0777f5d5795362195e35bdffc82a6eed55850a91
Signed-off-by: Erich Keane <erich.keane@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/320
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Patrick Lankswert <patrick.lankswert@intel.com>