Add mojo/tools/mopy with paths and version utilities

mojo/tools/run_mojo_python_bindings_tests.py

Index: mojo/tools/run_mojo_python_bindings_tests.py
diff --git a/mojo/tools/run_mojo_python_bindings_tests.py b/mojo/tools/run_mojo_python_bindings_tests.py
index 916c68d8754e53a956863787bdc5b0c050916667..d64f49cd1159f8de20dade1a5462f3cdd95aac24 100755
--- a/mojo/tools/run_mojo_python_bindings_tests.py
+++ b/mojo/tools/run_mojo_python_bindings_tests.py
@@ -6,14 +6,10 @@
 import os
 import sys
 
-_script_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.join(_script_dir, "pylib"))
-
-from mojo_python_tests_runner import MojoPythonTestRunner
+from mopy.mojo_python_tests_runner import MojoPythonTestRunner
 
 
 class PythonBindingsTestRunner(MojoPythonTestRunner):
-
   def add_custom_commandline_options(self, parser):
     parser.add_argument('--build-dir', action='store',
                         help='path to the build output directory')