Add 1GB flavor for ubuntu images

1GB is ideal for testing ubuntu images, 2GB was too much
considering our compute VMs have only 4GB of RAM. This
is essential when testing octavia because you need enough
RAM for the user VM, the amphora, and the compute host to
avoid crashes.

The xsmall flavor proposed is the same as the amphora size.

openstack/profiles/common

@@ -132,17 +132,18 @@ function create_tempest_users_v3 {
 }
 
 function create_tempest_flavors {
-    openstack flavor show m1.cirros || openstack flavor create  --id 6 --ram 64  --disk 1 --vcpus 1 m1.cirros
-    openstack flavor show m1.tempest || openstack flavor create --id 7 --ram 256 --disk 0 --vcpus 1 m1.tempest
-    openstack flavor show m2.tempest || openstack flavor create --id 8 --ram 512 --disk 0 --vcpus 1 m2.tempest
+    openstack flavor show m1.cirros  || openstack flavor create --id 7 --ram 64  --disk 1 --vcpus 1 m1.cirros
+    openstack flavor show m1.tempest || openstack flavor create --id 8 --ram 256 --disk 0 --vcpus 1 m1.tempest
+    openstack flavor show m2.tempest || openstack flavor create --id 9 --ram 512 --disk 0 --vcpus 1 m2.tempest
 }
 
 function create_default_flavors {
-    openstack flavor show m1.tiny || openstack flavor create   --id 1 --ram 512   --disk 1  --vcpus 1 m1.tiny
-    openstack flavor show m1.small || openstack flavor create  --id 2 --ram 2048  --disk 20 --vcpus 1 m1.small
-    openstack flavor show m1.medium || openstack flavor create --id 3 --ram 4096  --disk 20 --vcpus 2 m1.medium
-    openstack flavor show m1.large || openstack flavor create  --id 4 --ram 8192  --disk 20 --vcpus 4 m1.large
-    openstack flavor show m1.xlarge || openstack flavor create --id 5 --ram 16384 --disk 20 --vcpus 8 m1.xlarge
+    openstack flavor show m1.tiny   || openstack flavor create --id 1 --ram 512   --disk 1  --vcpus 1 m1.tiny
+    openstack flavor show m1.xsmall || openstack flavor create --id 2 --ram 1024  --disk 8 --vcpus 1 m1.xsmall
+    openstack flavor show m1.small  || openstack flavor create --id 3 --ram 2048  --disk 20 --vcpus 1 m1.small
+    openstack flavor show m1.medium || openstack flavor create --id 4 --ram 4096  --disk 20 --vcpus 2 m1.medium
+    openstack flavor show m1.large  || openstack flavor create --id 5 --ram 8192  --disk 20 --vcpus 4 m1.large
+    openstack flavor show m1.xlarge || openstack flavor create --id 6 --ram 16384 --disk 20 --vcpus 8 m1.xlarge
 }
 
 function is_ksv3 () {