Add pip freeze for debugging

To assist with debugging show what's in the venv.

Change-Id: If2c1455eaef22cf2087803860c5226a07801ea3e
diff --git a/turbo_hipster/task_plugins/real_db_upgrade/nova_mysql_migrations.sh b/turbo_hipster/task_plugins/real_db_upgrade/nova_mysql_migrations.sh
index 5ea4630..d23038c 100755
--- a/turbo_hipster/task_plugins/real_db_upgrade/nova_mysql_migrations.sh
+++ b/turbo_hipster/task_plugins/real_db_upgrade/nova_mysql_migrations.sh
@@ -57,6 +57,7 @@
   fi
 
   echo "Requirements installed"
+  pip freeze
 }
 
 db_sync() {