Coverity issues in contrail-analytics/QEOpServerProxy.cc

I have run Coverity on branch R5.0 and it reported the following issues in contrail-analytics/QEOpServerProxy.cc:
- Variable c going out of scope leaks the storage it points to in QEOpServerProxy.cc:QueryError
- Variable c going out of scope leaks the storage it points to in QEOpServerProxy.cc:StartPipeline

Change-Id: I119b2d2c2215adcaeb8967c2770809056faa771a
Closes-Bug: #1770148
Signed-off-by: Anda Nicolae <anicolae@lenovo.com>

contrail-query-engine/QEOpServerProxy.cc

@@ -708,6 +708,7 @@ class QEOpServerProxy::QEOpServerImpl {
         if (c->err) {
             QE_LOG_NOQID(ERROR, "Cannot report query error for " << qid <<
                 " . No Redis Connection");
+            redisFree(c);
             return;
         }
         //Authenticate the context with password
@@ -752,6 +753,7 @@ class QEOpServerProxy::QEOpServerImpl {
         if (c->err) {
             QE_LOG_NOQID(ERROR, "Cannot start Pipleline for " << qid <<
                 " . No Redis Connection");
+            redisFree(c);
             qs.set_error("No Redis Connection");
             QUERY_PERF_INFO_SEND(Sandesh::source(), // name
                                  "__UNKNOWN__",     // table