Fix quota set to target admin project

PR #1412 added a quota increase for pre-adoption Ironic test
instances, but targeted project 'default' instead of 'admin'.
The OS_CLOUD=overcloud authenticates as project admin
(clouds.yaml: project_name: admin), so quota set should
target admin to match the project instances are created under.

Since adoption migrates the TripleO DB, this quota carries
over to the adopted cloud, providing headroom for
post-adoption instance creation as well.

Related-Bug: #1412
Signed-off-by: Abhishek Bongale <abhishekbongale@outlook.com>

Author: abhibongale

tests/roles/development_environment/files/pre_launch_ironic.bash

@@ -134,7 +134,7 @@ fi
 
 # Ensure quota has headroom for pre-adoption and post-adoption test instances
 CURRENT_QUOTA=$(${BASH_ALIASES[openstack]} quota show -c instances -f value)
-${BASH_ALIASES[openstack]} quota set --instances $((CURRENT_QUOTA + 2)) default
+${BASH_ALIASES[openstack]} quota set --instances $((CURRENT_QUOTA + 2)) admin
 
 # Create test instance on baremetal
 if [[ "${PRE_LAUNCH_IRONIC_CREATE_INSTANCE,,}" != "false" ]]; then