[SSM] Fix context query parser issues

[SSM] Fix context query parser issues

This patch resolves issues that related to context query

which occures infinite loop and crash

Change-Id: I5acd9c57ee82a7ba1d3a5a416680a23676acfabb
Signed-off-by: jk13 <jihyeok13.kim@samsung.com>
(cherry picked from commit ba9725edbd9dccf87e8e57184e440168122b2cac)
Reviewed-on: https://gerrit.iotivity.org/gerrit/205
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Sudarshan Prasad <sudarshan.prasad@intel.com>