avoid potential NPE in RestapiCallNode

avoid potential NPE in class sendRequest method sendRequest

Issue-ID: CCSDK-3246
Signed-off-by: Smokowski, Kevin (ks6305) <ks6305@us.att.com>
Change-Id: I3b378336887b43c55ec2a3cdb8a82a4578eb6260
1 file changed