[molecule.specs] GenericSpec: store the .spec file path inside the class object

molecule/settings.py

@@ -222,7 +222,7 @@ class SpecParser(object):
                 " not supported, strategy: %s" % (
                     self.filepath, execution_strategy,))
 
-        self.__plugin = plugin()
+        self.__plugin = plugin(filepath)
         self.vital_parameters = self.__plugin.vital_parameters()
         self.parameters = self.__plugin.parameters()
 

molecule/specs/skel.py

@@ -80,6 +80,15 @@ class GenericSpec(object):
     # Molecule Plugin factory support
     BASE_PLUGIN_API_VERSION = 1
 
+    def __init__(self, spec_file):
+        """
+        Object constructor.
+
+        @param spec_file: path to the spec file to be parsed
+        @type spec_file: string
+        """
+        self._spec_file = spec_file
+
     def _command_splitter(self, string):
         """
         Split a command string into list using shlex.