Merge pull request #13341 from kpayson64/fix_loon

Default to 1 cq per sync server

include/grpc++/server_builder.h

@@ -202,10 +202,7 @@ class ServerBuilder {
 
   struct SyncServerSettings {
     SyncServerSettings()
-        : num_cqs(GPR_MAX(1, gpr_cpu_num_cores())),
-          min_pollers(1),
-          max_pollers(2),
-          cq_timeout_msec(10000) {}
+        : num_cqs(1), min_pollers(1), max_pollers(2), cq_timeout_msec(10000) {}
 
     /// Number of server completion queues to create to listen to incoming RPCs.
     int num_cqs;