Move salt formulas test to xenial jenkins node

Currently some tests are not build-able on jenkins bionic nodes

Related-bug: PROD-36062
Change-Id: I99990428ae976f2e8ee9d9d091c1a5fb7f0796c4
diff --git a/test-salt-formulas-env.groovy b/test-salt-formulas-env.groovy
index 43d318c..c526a51 100644
--- a/test-salt-formulas-env.groovy
+++ b/test-salt-formulas-env.groovy
@@ -27,6 +27,8 @@
   env.GERRIT_BRANCH = GERRIT_PARENT_BRANCH
 }
 
+def nodeLabel = 'old16.04'
+
 def checkouted = false
 def openstackTest = false
 def travisLess = false      /** TODO: Remove once formulas are witched to new config */
@@ -37,7 +39,7 @@
 
 throttle(['test-formula']) {
   timeout(time: 1, unit: 'HOURS') {
-    node("python&&docker") {
+    node(nodeLabel) {
       try {
         stage("checkout") {
           if (defaultGitRef && defaultGitUrl) {
diff --git a/test-salt-formulas-pipeline.groovy b/test-salt-formulas-pipeline.groovy
index 2876af1..6b86dad 100644
--- a/test-salt-formulas-pipeline.groovy
+++ b/test-salt-formulas-pipeline.groovy
@@ -14,7 +14,7 @@
 def gerritRef = env.GERRIT_REFSPEC ?: null
 def defaultGitRef = env.DEFAULT_GIT_REF ?: null
 def defaultGitUrl = env.DEFAULT_GIT_URL ?: null
-def slaveNode = env.SLAVE_NODE ?: 'virtual'
+def slaveNode = env.SLAVE_NODE ?: 'old16.04'
 def saltVersion = env.SALT_VERSION ?: ""
 
 gerritBranch = 'master'
diff --git a/test-salt-model-node.groovy b/test-salt-model-node.groovy
index 154df3d..9fded2e 100644
--- a/test-salt-model-node.groovy
+++ b/test-salt-model-node.groovy
@@ -28,9 +28,11 @@
 def distribRevision = env.DISTRIB_REVISION ?: 'nightly'
 def checkouted = false
 
+def nodeLabel = 'old16.04'
+
 throttle(['test-model']) {
   timeout(time: 1, unit: 'HOURS') {
-    node("python&&docker") {
+    node(nodeLabel) {
       try{
         stage("checkout") {
           if(defaultGitRef != "" && defaultGitUrl != "") {
diff --git a/test-salt-models-pipeline.groovy b/test-salt-models-pipeline.groovy
index 3b88aee..0b4a4d6 100644
--- a/test-salt-models-pipeline.groovy
+++ b/test-salt-models-pipeline.groovy
@@ -86,8 +86,10 @@
   return true;
 }
 
+def nodeLabel = 'old16.04'
+
 timeout(time: 12, unit: 'HOURS') {
-  node("python") {
+  node(nodeLabel) {
     try{
       stage("checkout") {
         if (gerritRef) {