Drop openQA asset size limit on stg to try and save disk space

stg's disk is groaning at the seams, let's drop this to 400GB to
try and give it a bit of room to breathe.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

inventory/group_vars/openqa

@@ -7,6 +7,7 @@ openqa_dbname: openqa
 openqa_dbhost: db-qa03.qa.fedoraproject.org
 openqa_dbuser: openqa
 openqa_dbpassword: "{{ prod_openqa_dbpassword }}"
+openqa_assetsize: 500
 
 openqa_key: "{{ prod_openqa_apikey }}"
 openqa_secret: "{{ prod_openqa_apisecret }}"

inventory/group_vars/openqa_common

@@ -13,7 +13,6 @@ openqa_nickname: adamwill
 openqa_fullname: Adam Williamson
 openqa_userid: http://adamwill.id.fedoraproject.org/
 
-openqa_assetsize: 500
 openqa_assetsize_updates: 100
 
 # we need this for all our fedora-messaging consumers as they are not

inventory/group_vars/openqa_stg

@@ -18,6 +18,7 @@ openqa_dbname: openqa-stg
 openqa_dbhost: db-qa03.qa.fedoraproject.org
 openqa_dbuser: openqastg
 openqa_dbpassword: "{{ stg_openqa_dbpassword }}"
+openqa_assetsize: 400
 openqa_assetsize_ppc: 150
 openqa_assetsize_aarch64: 150