Update version from 1.6.0 -> 1.7.0rc1.

Change-Id: I420a8907142bffad0e3aa6c7196541ca2309c099
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 99301ed..f5ffb6d 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -48,9 +48,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '1.6'
+version = '1.7'
 # The full version, including alpha/beta/rc tags.
-release = '1.6.0'
+release = '1.7.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.