Ignore submodules in test directory

so they are not installed under test folder in python site-packages

Also remove the temp*.py exclusion as this does not seem to have any purpose

Author: davismr

setup.py

@@ -31,7 +31,7 @@ def getRequires():
     author='Elmer Thomas, Yamil Asusta',
     author_email='help@twilio.com',
     url='https://github.com/sendgrid/sendgrid-python/',
-    packages=find_packages(exclude=["temp*.py", "test"]),
+    packages=find_packages(exclude=["test", "test.*"]),
     include_package_data=True,
     license='MIT',
     description='Twilio SendGrid library for Python',