Pipeline fixes

  * Multiple issues, spawned by
   'Allign RECLASS_VERSION|FORMULAS_REVISION=>DISTRIB_REVISION'

Change-Id: I52ad587c988cd9ed7f6bb04a18d5f879906d11cc
diff --git a/test-salt-models-pipeline.groovy b/test-salt-models-pipeline.groovy
index c119e9c..3b88aee 100644
--- a/test-salt-models-pipeline.groovy
+++ b/test-salt-models-pipeline.groovy
@@ -15,13 +15,14 @@
  */
 
 def gerrit = new com.mirantis.mk.Gerrit()
-def common = new com.mirantis.mk.Common()
+common = new com.mirantis.mk.Common()
 def ssh = new com.mirantis.mk.Ssh()
 def git = new com.mirantis.mk.Git()
 
 def config_node_name_pattern = env.CONFIG_NODE_NAME_PATTERN ?: 'cfg01'
-def gerritRef = env.GERRIT_REFSPEC ?: GERRIT_REFSPEC
+def gerritRef = env.GERRIT_REFSPEC ?: null
 def formulasSource = env.FORMULAS_SOURCE ?: 'pkg'
+distribRevision = env.DISTRIB_REVISION ?: 'nightly'
 
 def testClusterNames = env.TEST_CLUSTER_NAMES ?: ''
 def defaultGitRef = env.DEFAULT_GIT_REF ?: null