setup.py: Upgrade to version 2.0.

Change-Id: I82f8dbae30e0ce804c335f05be19e7d81d91a958

Author: gpiyush-dev

setup.py

@@ -11,5 +11,5 @@
       description='Installer code for photon',
       packages=find_packages(include=['photon_installer', 'photon_installer.modules']),
       include_package_data=True,
-      version='1.0+'+get_installer_version(),
+      version='2.0+'+get_installer_version(),
       author_email='[email protected]')