Merge changes I9eb1a3e2,I212e61d2

* changes:
  Bug fix in stage 3 related to repo_base_url
  hackfest_basic_vnfd: added alternative-image for aws
diff --git a/descriptor-packages/vnfd/hackfest_basic_vnf/src/hackfest_basic_vnfd.yaml b/descriptor-packages/vnfd/hackfest_basic_vnf/src/hackfest_basic_vnfd.yaml
index 3c18d79..4051eb3 100644
--- a/descriptor-packages/vnfd/hackfest_basic_vnf/src/hackfest_basic_vnfd.yaml
+++ b/descriptor-packages/vnfd/hackfest_basic_vnf/src/hackfest_basic_vnfd.yaml
@@ -13,6 +13,9 @@
         -   id: hackfest_basic-VM
             name: hackfest_basic-VM
             image: ubuntu1604
+            alternative-images:
+            -   vim-type: aws
+                image: ubuntu/images/hvm-ssd/ubuntu-artful-17.10-amd64-server-20180509
             count: '1'
             vm-flavor:
                 vcpu-count: '1'
diff --git a/jenkins/ci-pipelines/ci_stage_3.groovy b/jenkins/ci-pipelines/ci_stage_3.groovy
index 6d0d00e..47ab0e1 100644
--- a/jenkins/ci-pipelines/ci_stage_3.groovy
+++ b/jenkins/ci-pipelines/ci_stage_3.groovy
@@ -225,6 +225,11 @@
                         release = "-R ${params.RELEASE}"
                     }
              
+                    if ( params.REPOSITORY_BASE )
+                    {
+                        repo_base_url = "-u ${params.REPOSITORY_BASE}"
+                    }
+             
                     sh """
                         export PATH=$PATH:/snap/bin
                         installers/full_install_osm.sh -y -s ${container_name} --test --nolxd --nodocker --nojuju --nohostports --nohostclient \