Fix memory leaks in handling server requests.
Fix memory leaks in handling server requests.

Two memory leaks fixed. One after a response is sent and one when a
server request is deleted. malloc'ed tokens were not free'd in both
instances.

Change-Id: I125bab278dd8542ff5970e6655b24a5cbacfe7e9
Signed-off-by: Mandeep Shetty <9576c34ab780cbbd29c2639a47eb90b07da66bfe@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/1040
Tested-by: jenkins-iotivity <09cb29e8a2b473a2c978382eec13ee06fa017bda@opendaylight.org>
Reviewed-by: Sakthivel Samidurai <2b42ef6ad9ddc9eb44e2c60668b448d90a7d2d41@intel.com>
Reviewed-by: Erich Keane <ec9f61fe526c14bb62c55d7c978f025ee6b3583d@intel.com>

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