play: increase timeout (#625)

Workflows can take substantially longer than 20 seconds to startup.

Author: oliver-sanders

cylc/uiserver/resolvers.py

@@ -314,7 +314,7 @@ async def play(
                     stderr=PIPE,
                     text=True
                 )
-                ret_code = proc.wait(timeout=20)
+                ret_code = proc.wait(timeout=120)
 
                 if ret_code:
                     # command failed

cylc/uiserver/tests/test_resolvers.py

@@ -224,7 +224,7 @@ def wait(timeout):
         log=Mock(),
     )
     assert ret == [
-        False, "Command 'cylc play wflow1' timed out after 20 seconds"
+        False, "Command 'cylc play wflow1' timed out after 120 seconds"
     ]