Bump fuel-devos version to commit c39a2a9

- Add shared backing storage, to re-use existing image instead
  of copying it for each new environment
- CLI improvement: Ensure networks are running before starting node

Change-Id: Idbc7e43a0d78db333902b852d017be7a3bed4e92
diff --git a/tcp_tests/requirements.txt b/tcp_tests/requirements.txt
index d0260f2..381be12 100644
--- a/tcp_tests/requirements.txt
+++ b/tcp_tests/requirements.txt
@@ -1,5 +1,5 @@
 # git+git://github.com/openstack/fuel-devops.git@887368d#egg=project[postgre]   # Use this requirement for PostgreSQL
-git+git://github.com/openstack/fuel-devops.git@e115ef4   # Use this requirement for Sqlite3, or if requirements for PostgreSQL are already installed
+git+git://github.com/openstack/fuel-devops.git@c39a2a9   # Use this requirement for Sqlite3, or if requirements for PostgreSQL are already installed
 git+git://github.com/dis-xcom/fuel-devops-driver-ironic
 paramiko
 six