[ci] Add luacheck to tests #77

Remove all filter flags from luacheck
Ensure luacheck tests over all code

Fixes #77

Author: talha-p

runtests

@@ -1,7 +1,7 @@
 #!/bin/bash
 set -e
+luacheck . -a
 cd openwisp-config/tests/
-luacheck . -d -a -r
 lua test_store_unmanaged.lua -v
 lua test_restore_unmanaged.lua -v
 lua test_uci_autoname.lua -v