Allow to configure image_size_cap

via the same-named pillar:

  glance:
    server:
      image_size_cap: 2199023255552 # 2TB, twice current default

Related-Issue: PROD-35338
Change-Id: I7722d737466b1cb8550b4a5281776492df43ba37
diff --git a/glance/files/pike/glance-registry.conf.Debian b/glance/files/pike/glance-registry.conf.Debian
index 9657420..5bab699 100644
--- a/glance/files/pike/glance-registry.conf.Debian
+++ b/glance/files/pike/glance-registry.conf.Debian
@@ -341,6 +341,9 @@
 # Minimum value: 1
 # Maximum value: 9223372036854775808
 #image_size_cap = 1099511627776
+{%- if server.image_size_cap is defined %}
+image_size_cap = {{ server.image_size_cap }}
+{%- endif %}
 
 #
 # Maximum amount of image storage per tenant.