Add luacheck config and fix warnings found by luacheck

- removed statement with info variable as it is unused
- luacheck contains same global supressions
  as config in tarantool repository
- path with tarantool-python is excluded until [1] is open

1. tarantool/tarantool-python#178

Part of #208

Author: ligurio

.luacheckrc

@@ -0,0 +1,29 @@
+globals = {"box", "_TARANTOOL", "tonumber64"}
+ignore = {
+    -- Accessing an undefined field of a global variable <debug>.
+    "143/debug",
+    -- Accessing an undefined field of a global variable <string>.
+    "143/string",
+    -- Accessing an undefined field of a global variable <table>.
+    "143/table",
+    -- Unused argument <self>.
+    "212/self",
+    -- Redefining a local variable.
+    "411",
+    -- Redefining an argument.
+    "412",
+    -- Shadowing a local variable.
+    "421",
+    -- Shadowing an upvalue.
+    "431",
+    -- Shadowing an upvalue argument.
+    "432",
+}
+
+include_files = {
+    "**/*.lua",
+}
+
+exclude_files = {
+    "lib/tarantool-python",
+}

test_run.lua

@@ -163,7 +163,6 @@ local function wait_fullmesh(self, servers)
                 log.info("%s: bootstrapped", server)
                 break
             end
-            local info = self:eval(server, "box.info")
             fiber.sleep(0.01)
         end
         -- wait all for full mesh