STRM-1269: Add manifest to enable CI

Why?
 - We needed to add the manifest file so CI trigger
   the build when we create a release tag in github

sdks/python/apache_beam/version.py

@@ -18,4 +18,4 @@
 """Apache Beam SDK version information and utilities."""
 
 
-__version__ = '2.7.0.dev'
+__version__ = '2.7.0.post1'

sdks/python/manifest.yaml

@@ -0,0 +1,20 @@
+name: apache_beam
+description: Lyft version of Apache Beam python package
+repository: [email protected]:lyft/beam.git
+report_ci: true
+credentials: true
+builder:
+  name: s2i
+  params:
+    builder: lyft/s2ipythonlibrary:494bddd033e63c155aababf999650fea120bb664
+deploy:
+  - name: staging
+    legacy: true
+    role: lyftpypi-staging-iad-deploy
+  - name: production
+    legacy: true
+    role: lyftpypi-production-iad-deploy
+    automatic: true
+languages:
+  - python
+image_type: library