Add event notification support and rdci timestamps

Also:
* print header line every 50 line on output
* print events that are being listened for with header
* cpplint clean-up

Change-Id: Ic049eb79156a9528b556e56f0fa43e1344f898cc

server/src/rdc_api_service.cc

@@ -385,7 +385,10 @@ RdcAPIServiceImpl::~RdcAPIServiceImpl() {
     } else if (value.type == DOUBLE) {
         reply->set_dbl(value.value.dbl);
     } else if (value.type == STRING || value.type == BLOB) {
-        reply->set_str(value.value.str);
+      std::string val_str(value.value.str);
+      size_t endpos = val_str.find_last_not_of(" ");
+      val_str[endpos + 1] = '\0';
+      reply->set_str(val_str);
     }
 
     return ::grpc::Status::OK;

server/src/rdc_server_main.cc

@@ -317,7 +317,6 @@ RDCServer::ShutDown(void) {
     delete api_service_;
     api_service_ = nullptr;
   }
-
 }
 
 static void * ProcessSignalLoop(void *server_ptr) {