generic.tests: unattended_install.large_image: add config for RHEL7 and Windows

Signed-off-by: NXueqiang Wei <xuwei@redhat.com>

generic/tests/cfg/unattended_install.cfg

@@ -83,8 +83,21 @@
         - large_image:
             only unattended_install.cdrom
             only qcow2 qcow2v3
+            install_timeout = 7200
             image_size_image1 = 2300G
             image_size = 2300G
+            RHEL.7:
+                image_size_image1 = 16300G
+                image_size = 16300G
+                images += " stg"
+                image_name_stg = images/storage
+                image_size_stg = 500000G
+            Windows:
+                image_size_image1 = 16300G
+                image_size = 16300G
+                images += " stg"
+                image_name_stg = images/storage
+                image_size_stg = 16000G
         - 128g_image_512_cluster_size:
             image_size_image1 = 128G
             image_cluster_size = 512