Remove redundant rockpecs. Move scm-1 to project root

Author: RunsFor

rockspecs/mqtt-scm-2.rockspec mqtt-scm-1.rockspecrockspecs/mqtt-scm-2.rockspec renamed to mqtt-scm-1.rockspec

@@ -1,5 +1,5 @@
 package = "mqtt"
-version = "scm-2"
+version = "scm-1"
 source = {
     url = "git://github.com/tarantool/mqtt.git",
     tag = "master"