Bump glance-store requirement

This adds a fix for S3 multipart upload [1].

[1] stackhpc/glance_store#6

Change-Id: I5bc8b4be742c89ad7107cbe57a527a94c2b44ad9

Author: priteau

requirements.txt

@@ -42,7 +42,7 @@ retrying!=1.3.0,>=1.2.3 # Apache-2.0
 osprofiler>=1.4.0 # Apache-2.0
 
 # Glance Store
-glance-store @ git+https://github.com/stackhpc/glance_store@stackhpc/4.7.0.3 # Apache-2.0
+glance-store @ git+https://github.com/stackhpc/glance_store@stackhpc/4.7.0.6 # Apache-2.0
 
 
 debtcollector>=1.19.0 # Apache-2.0