Update version constants for client release 1.0.0-beta.1

Author: mbohlool

scripts/constants.py

@@ -19,11 +19,11 @@
 
 # Spec version will be set in downloaded spec and all
 # generated code will refer to it.
-SPEC_VERSION = "v1.5.0-snapshot"
+SPEC_VERSION = "v1.5.1"
 
 # client version for packaging and releasing. It can
 # be different than SPEC_VERSION.
-CLIENT_VERSION = "1.0.0-snapshot"
+CLIENT_VERSION = "1.0.0-beta.1"
 
 # Name of the release package
 PACKAGE_NAME = "kubernetes"