There should be the only one "workspaces" namespace used to install CRW starting from Eclipse Che 7.19 / CRW 2.5.

Notes: https://hackmd.io/nWfj_ZlZTrK7xrqoQutxTA

We can't have more that 5 OCP instances at a time on our CRW PSI having 750 RAM, because of single OCP 4.x instance requires https://github.com/openshift/installer/tree/master/docs/user/openstack#openstack-requirements :

• Floating IPs: 2 (plus one that will be created and destroyed by the Installer during the installation process)
• Security Groups: 3
• Security Group Rules: 60
• Routers: 1
• Subnets: 1
• Server Groups: 1
• RAM: 112 GB
• vCPUs: 28
• Volume Storage: 175 GB
• Instances: 7

To address this limitation we should:
1) make pipeline for installing OCP on PSI Openstack be able to be triggered from another pipeline (https://issues.redhat.com/browse/CRW-838)

2) fix existed CRW testing pipelines to use "workspaces" namespace to install CRW starting from 2.5 version (https://issues.redhat.com/browse/CRW-1132)

3) fix CRW testing pipelines to run the E2E tests against dedicated QE OCP instance created instantly (https://issues.redhat.com/browse/CRW-1133)

4) provide tests of migration from CRW 2.3 installed in non-default namespace to CRW 2.5 (https://issues.redhat.com/browse/CRW-1134)