Fix CC model for released-heat* envs

CC contexts for 'released-heat-cicd-pike-contrail41-sl'
and 'released-heat-cicd-pike-dvr-sl' envs were missing
jenkins_pipelines_branch variable. Consequently,
shared-salt.MACRO_GENERATE_COOKIECUTTER_MODEL macro was not
updating this variable with a value provided by
JENKINS_PIPELINE_BRANCH jenkins job param.
As a result jenkins_pipelines_branch model parameter of the
deployed env was set by cookiecutter-templates as:
   jenkins_pipelines_branch: "release/${_param:mcp_version}"

Change-Id: Ibc7285607d7ed066c989af1702a10825d5317f46
Related-Prod:PROD-34612
diff --git a/tcp_tests/templates/released-heat-cicd-pike-dvr-sl/salt-context-cookiecutter.yaml b/tcp_tests/templates/released-heat-cicd-pike-dvr-sl/salt-context-cookiecutter.yaml
index 902f640..0d0f1a8 100644
--- a/tcp_tests/templates/released-heat-cicd-pike-dvr-sl/salt-context-cookiecutter.yaml
+++ b/tcp_tests/templates/released-heat-cicd-pike-dvr-sl/salt-context-cookiecutter.yaml
@@ -365,6 +365,7 @@
   octavia_lb_mgmt_allocation_pool_end: 192.168.10.200
   cinder_backup_engine: 'ceph'
   cinder_ceph_backup_pool_name: 'backups'
+  jenkins_pipelines_branch: 'release/2019.2.0'
   maas_enabled: 'True'
   maas_deploy_address: ==IPV4_NET_ADMIN_PREFIX==.15
   maas_deploy_cidr: ==IPV4_NET_ADMIN_PREFIX==.0/24