[IOT-995] Fix memory reallocation for security resources

[IOT-995] Fix memory reallocation for security resources

When CborOutOfMemory is generated reallocation should be based on
encoder.ptr incremented value.

It also fixes allocation for security payload. It allocates value
based on the payload size.

Change-Id: I5213679d65e48bb91cd590d3cc654a6cd80b2af2
Signed-off-by: Habib Virji <habib.virji@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/6241
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Chul Lee <chuls.lee@samsung.com>
Reviewed-by: Yonggoo Kang <ygace.kang@samsung.com>