force to load openpype modules on install

openpype/__init__.py

@@ -68,6 +68,10 @@ def patched_discover(superclass):
 def install():
     """Install Pype to Avalon."""
     from pyblish.lib import MessageHandler
+    from openpype.modules import load_modules
+
+    # Make sure modules are loaded
+    load_modules()
 
     def modified_emit(obj, record):
         """Method replacing `emit` in Pyblish's MessageHandler."""