[#7284] Disable YCQL system.partitions master side cache

Summary: Disabling this by default in master, will enable on demand.

Test Plan: Jenkins

Reviewers: nicolas, rsami, rahuldesirazu

Reviewed By: rahuldesirazu

Subscribers: ybase

Differential Revision: https://phabricator.dev.yugabyte.com/D10647

src/yb/master/catalog_manager.cc

@@ -347,7 +347,7 @@ DEFINE_double(heartbeat_safe_deadline_ratio, .20,
 DECLARE_int32(heartbeat_rpc_timeout_ms);
 DECLARE_CAPABILITY(TabletReportLimit);
 
-DEFINE_int32(partitions_vtable_cache_refresh_secs, 30,
+DEFINE_int32(partitions_vtable_cache_refresh_secs, 0,
              "Amount of time to wait before refreshing the system.partitions cached vtable.");
 
 DEFINE_int32(txn_table_wait_min_ts_count, 1,