fixed issue #28 with sudo test

added ansible 2.3 int travis tests

.travis.yml

@@ -5,7 +5,8 @@ os: linux
 dist: trusty
 env:
   - ansible_version="2.1.4.0"
-  - ansible_version="2.2.1.0"
+  - ansible_version="2.2.2.0"
+  - ansible_version="2.3.0.0"
 
 sudo: required
 

tasks/setup_env.yml

@@ -30,7 +30,7 @@
 
 - name: "[ENV] - rolling back to su."
   set_fact: ansible_become_method="su"
-  when: nc_sudo_installed_result is defined and nc_sudo_installed_result.rc != 0
+  when: (nc_sudo_installed_result.rc is defined) and (nc_sudo_installed_result.rc != 0)
 
 # fix for ubuntu 14.04 with permission issue for unprivileged user :
 - name: "[NC] - Adding ACL on trusty."