use retry to run nova:compute

Change-Id: I7ccf1e9f51ac549f112cf2e869d231acb8ec6099
diff --git a/lab-pipeline.groovy b/lab-pipeline.groovy
index 15b9649..4235213 100644
--- a/lab-pipeline.groovy
+++ b/lab-pipeline.groovy
@@ -364,8 +364,9 @@
                 stage('Install OpenStack compute') {
                     //orchestrate.installOpenstackMkCompute(saltMaster, physical)
                     // Configure compute nodes
-                    salt.runSaltProcessStep(saltMaster, 'I@nova:compute', 'state.apply', null, true)
-                    salt.runSaltProcessStep(saltMaster, 'I@nova:compute', 'state.apply', null, true)
+                    retry(2) {
+                        salt.runSaltProcessStep(saltMaster, 'I@nova:compute', 'state.apply', null, true)
+                    }
 
                     // Provision opencontrail virtual routers
                     if (INSTALL.toLowerCase().contains('kvm')) {