Switch to flexible test schema definition in oscc-ci-pipeline

oscc-ci-pipeline is used as gate for automatic promotion from nightly to
testing. It requires to run AIO and Multinode configurations. Since we
have comptely different branching structure, jobs for AIO and Multinode
models, we have to be able flexibly define test schema. This patch
implements this by setting TEST_SCHEMAS variable that uses the following
structure:

aio:cluster-name1:branch1,branch2|multinode:cluster-name2:branch1,branch2

Change-Id: I1bf43ac987504e0c7c85921672a5180e92ee328a
diff --git a/jenkins/client/job/oscore/tests.yml b/jenkins/client/job/oscore/tests.yml
index 56ecfe2..d06160e 100644
--- a/jenkins/client/job/oscore/tests.yml
+++ b/jenkins/client/job/oscore/tests.yml
@@ -574,10 +574,6 @@
               STACK_RECLASS_ADDRESS:
                 type: string
                 default: "{{stack_reclass_address}}"
-              OPENSTACK_RELEASES:
-                type: string
-                default: "{{openstack_releases}}"
-                description: "OpenStack releases with comma delimeter which have to be testes. For example: pike,ocata"
               SOURCE_REPO_NAME:
                 type: string
                 description: "Name of the repo where packages are stored"
@@ -598,14 +594,10 @@
                 type: boolean
                 default: "{{auto_promote}}"
                 description: Enable to autopromote repo
-              TEST_MULTINODE:
-                type: boolean
-                default: "{{test_multinode}}"
-                description: Whether to test nightly snapshot against multi-node virtual models
-              STACK_CLUSTER_NAMES:
+              TEST_SCHEMAS:
                 type: string
-                default: "{{stack_cluster_names}}"
-                description: "Cluster name to use from reclass to deploy multi-node"
+                default: "{{test_schemas}}"
+                description: "Defines structure to pass aio:cluster-name1:branch1,branch2|multinode:cluster-name2:branch1,branch2"
         build-salt-formula-refspec-template:
           name: "{{job_prefix}}-build-salt-formula-refspec"
           template: