Implement test_install_policy UT

It was missed the Unit test that verifies the installation of policy
services.  This commit creates that method and also refactors some
policy code

Change-Id: I58f3f416efc096fc6199fd831bb63293b95157d2
Signed-off-by: Victor Morales <victor.morales@intel.com>
Issue-Id: INT-23
diff --git a/bootstrap/vagrant-onap/lib/functions b/bootstrap/vagrant-onap/lib/functions
index 9b903d9..90af2bc 100755
--- a/bootstrap/vagrant-onap/lib/functions
+++ b/bootstrap/vagrant-onap/lib/functions
@@ -6,15 +6,12 @@
 source /var/onap/_composed_functions
 source /var/onap/_onap_functions
 
+export MTU=$(/sbin/ifconfig | grep MTU | sed 's/.*MTU://' | sed 's/ .*//' |sort -n | head -1)
+export IP_ADDRESS=$(ifconfig eth0 | grep "inet addr" | tr -s ' ' | cut -d' ' -f3 | cut -d':' -f2)
+
 mvn_conf_file=/root/.m2/settings.xml
 git_src_folder=/opt
 
-# export_env_vars() - Export environment variables
-function export_env_vars {
-    export MTU=$(/sbin/ifconfig | grep MTU | sed 's/.*MTU://' | sed 's/ .*//' |sort -n | head -1)
-    export IP_ADDRESS=$(ifconfig eth0 | grep "inet addr" | tr -s ' ' | cut -d' ' -f3 | cut -d':' -f2)
-}
-
 # configure_dns() - DNS/GW IP address configuration
 function configure_dns {
     echo "nameserver 10.0.0.1" >> /etc/resolvconf/resolv.conf.d/head
@@ -51,7 +48,7 @@
     local repo=$1
     local dest_folder=${2:-$git_src_folder/$repo}
     if [ ! -d $dest_folder ]; then
-        _git_timed clone -b $gerrit_branch --single-branch ${repo_url}${repo} $dest_folder
+        _git_timed clone ${repo_url}${repo} $dest_folder
     else
         pushd $dest_folder
         _git_timed pull