Adding linux.netowrk.host state to compute install pipeline.

This fix migration failure issue when new compute node is added to cluster

Change-Id: I80ce81154d33230900c64c627078995e41521672
Closes-Bug: https://mirantis.jira.com/browse/PROD-24896
diff --git a/openstack-compute-install.groovy b/openstack-compute-install.groovy
index 2b37fba..581168a 100644
--- a/openstack-compute-install.groovy
+++ b/openstack-compute-install.groovy
@@ -57,6 +57,10 @@
                 salt.runSaltProcessStep(pepperEnv, targetLiveAll, 'pkg.upgrade', [], null, true)
             }
 
+            stage("Update Hosts file") {
+                salt.enforceState(pepperEnv, "I@linux:system", 'linux.network.host', true)
+            }
+
             stage("Setup networking") {
                 // Sync all of the modules from the salt master.
                 salt.syncAll(pepperEnv, targetLiveAll)