ignore failure for calling group members api

Author: skyhit

src/java/main/com/topcoder/direct/services/view/action/contest/launch/GetGroupMemberAction.java

@@ -153,6 +153,9 @@ private Set<Long> getGroupMembers() throws Exception{
                 if (!gidProcessed.contains(gid)) {
                     logger.info("processing gid: " + gid);
                     RestResult<GroupMember> result = getGroupMemberByGid(gid);
+                    if (result == null) {
+                        continue;
+                    }
                     for (GroupMember gm : result.getContent()) {
                         if (gm.isGroup()) {
                             if (!gids.contains(gm.getMemberId())) {
@@ -199,7 +202,8 @@ private RestResult<GroupMember> getGroupMemberByGid(Long gid) throws Exception {
             HttpEntity entity = response.getEntity();
 
             if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
-                throw new Exception("Failed to get Group Member for " + gid + " - " + response.getStatusLine().toString());
+                logger.error("Failed to get Group Member for " + gid + " - " + response.getStatusLine().toString());
+                return null;
             }
 
             jsonNode = objectMapper.readTree(entity.getContent());