Update Jenkins hostname to fix build.

Also added .gitignore entry for new subrepos.

Change-Id: I1eb82a3228b4fc8e345db706000c4ae9ee086fdd
diff --git a/Jenkinsfile b/Jenkinsfile
index 6a2a67e..dcd0b97 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -1,4 +1,4 @@
-node ('host-master') {
+node ('master') {
     stage 'Checkout code'
     checkout([$class: 'RepoScm', currentBranch: true, manifestRepositoryUrl: 'https://gerrit.opencord.org/manifest', quiet: true])