Fix for SVACE and Klocwork issues in RAML parser module.

Fix for SVACE and Klocwork issues in RAML parser module.

This includes code changes for following issues
1. SVACE reported issues.
2. Klocwork reported issues.
3. Setting array minimum, maximum, unique and additional items property properly.

Change-Id: I7ffd8f985ff6db02c1469c6c86884f9c5baadaf5
Signed-off-by: Harish Kumara Marappa <h.marappa@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/5371
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>