Use start script __main__.py which enables 'python -m openlp'

setup.py

@@ -161,7 +161,6 @@ using a computer and a data projector.""",
     url='https://openlp.org/',
     license='GPL-3.0-or-later',
     packages=find_packages(exclude=['ez_setup', 'tests*']),
-    py_modules=['run_openlp'],
     include_package_data=True,
     zip_safe=False,
     python_requires='>=3.6',
@@ -207,5 +206,5 @@ using a computer and a data projector.""",
         'python-xlib; platform_system=="Linux"'
     ],
     test_suite='nose2.collector.collector',
-    entry_points={'gui_scripts': ['openlp = run_openlp:start']}
+    entry_points={'gui_scripts': ['openlp = openlp.__main__:start']}
 )

tests/functional/openlp_core/ui/test_mainwindow.py

@@ -107,7 +107,7 @@ class TestMainWindow(TestCase, TestMixin):
         Test that passing a non service file does nothing.
         """
         # GIVEN a non service file as an argument to openlp
-        service = 'run_openlp.py'
+        service = 'setup.py'
 
         # WHEN the argument is processed
         self.main_window.open_cmd_line_files(service)