Try to get test/shard_* semi-working on shard-2.1

Author: Totktonada

test/shard_servers/master.lua

@@ -12,16 +12,16 @@ function instance_uri(instance_id)
 end
 
 function init_shard(servers, config, suite)
+    if shard_initialized then return end
+
     local shard = require('shard')
     local env = require('test_run')
     local test_run = env.new()
 
     test_run:create_cluster(servers, suite)
-    if not shard_initialized then
-        shard.init(config)
-        shard_initialized = true
-    end
+    shard.init(config)
     shard.wait_connection()
+    shard_initialized = true
 end
 
 require('console').listen(os.getenv('ADMIN'))