Addressed comments from reviewers from the last commit. Cleaned up color
coding in the installer messages. Added explicit command line parsing to
support future arguments. Lowered the privilage of the user that starts
the cluster services.

Change-Id: Ia287890548bfc9096e1919641b2f4c1f39f443e2
diff --git a/install/ansible/roles/cluster-host/tasks/main.yml b/install/ansible/roles/cluster-host/tasks/main.yml
index 6280b6f..3d2296e 100644
--- a/install/ansible/roles/cluster-host/tasks/main.yml
+++ b/install/ansible/roles/cluster-host/tasks/main.yml
@@ -69,7 +69,7 @@
     dest: "/var/lib/apt"
   tags: [cluster_host]
 
-- name: Dependent software is installed (this cand take about 10 Min, DONT'T PANIC, go for coffee instead)
+- name: Dependent software is installed (this can take about 10 Min, DONT'T PANIC, go for coffee instead)
   command: dpkg -R -i "{{ target_voltha_home }}/deb_files"
 #  ignore_errors: true
   when: target == "cluster"