Fixed Blocker Sonar issues in ProxyServlet.java
Fixed 2 Sonar blocker issues in proxyServelet.java
https://sonar.onap.org/project/issues?id=org.onap.dmaap.datarouter%3Aparent&open=AWHpc14DRGy6eclHCoS-&resolved=false&severities=BLOCKER&types=BUG
https://sonar.onap.org/project/issues?id=org.onap.dmaap.datarouter%3Aparent&open=AWHpc14DRGy6eclHCoS9&resolved=false&severities=BLOCKER&types=BUG
Issue-ID: DMAAP-673
Change-Id: Iafa0e0cfedb3fbb29b202d069c2bc0c90d962bfa
Signed-off-by: Amaresh Kumar <kamaresh@in.ibm.com>