Reduce timeout for salt-models tests

Change-Id: I611af00dea15a0a57b0881b55f9a8584194ccbf4
diff --git a/src/com/mirantis/mk/SaltModelTesting.groovy b/src/com/mirantis/mk/SaltModelTesting.groovy
index 0d228e4..d25d79b 100644
--- a/src/com/mirantis/mk/SaltModelTesting.groovy
+++ b/src/com/mirantis/mk/SaltModelTesting.groovy
@@ -19,7 +19,7 @@
 
 def setupAndTestNode(masterName, clusterName, extraFormulas, testDir, formulasSource = 'pkg', formulasRevision = 'stable', dockerMaxCpus = 0, ignoreClassNotfound = false, legacyTestingMode = false, aptRepoUrl='', aptRepoGPG='') {
   // timeout for test execution
-  def testTimeout = 40 * 60
+  def testTimeout = 20 * 60
   def saltOpts = "--retcode-passthrough --force-color"
   def common = new com.mirantis.mk.Common()
   def workspace = common.getWorkspace()