[#3742] Create database fails inside docker yugabyted

Summary:
yb-master defaults to 10% of avail system mem. This makes operations like create database fail when run within docker. Docker containers have 2G RAM by default and 10% of 2G is too small to run create database.

Logs of a similar run at https://gist.github.com/iSignal/b80419978db81fe456d0ebff9bd36136

Test Plan: Copy yugabyted into a docker container, run create database within

Reviewers: wesley, bogdan

Reviewed By: bogdan

Differential Revision: https://phabricator.dev.yugabyte.com/D8055

bin/yugabyted

@@ -395,7 +395,8 @@ class ControlScript(object):
                 "--server_dump_info_path={}".format(
                     os.path.join(self.configs.saved_data.get("data_dir"), "master-info")),
                 "--master_enable_metrics_snapshotter=true",
-                "--webserver_port={}".format(self.configs.saved_data.get("master_webserver_port"))
+                "--webserver_port={}".format(self.configs.saved_data.get("master_webserver_port")),
+                "--default_memory_limit_to_ram_ratio=0.35"
             ]
         if self.configs.saved_data.get("master_flags"):
             yb_master_cmd.extend(
@@ -415,7 +416,8 @@ class ControlScript(object):
                     bind_ip, self.configs.saved_data.get("ysql_port")),
                 "--tserver_enable_metrics_snapshotter=true",
                 "--metrics_snapshotter_interval_ms=11000",
-                "--webserver_port={}".format(self.configs.saved_data.get("tserver_webserver_port"))
+                "--webserver_port={}".format(self.configs.saved_data.get("tserver_webserver_port")),
+                "--default_memory_limit_to_ram_ratio=0.6"
             ]
 
         if self.configs.saved_data.get("tserver_flags"):