Use correct value of ansible_distribution in integration tests

This fixes integration tests when run on a RHEL system.  Oddly, the
ansible_distribution='RedHat' when run on RHEL.

test/integration/roles/test_service/tasks/main.yml

@@ -11,7 +11,7 @@
     - "install_result.mode == '0755'"
 
 - include: 'sysv_setup.yml'
-  when: ansible_distribution in ('RHEL', 'CentOS', 'ScientificLinux')
+  when: ansible_distribution in ['Redhat', 'CentOS', 'ScientificLinux']
 - include: 'systemd_setup.yml'
   when: ansible_distribution == 'Fedora'
 - include: 'upstart_setup.yml'
@@ -101,7 +101,7 @@
     - "remove_result.state == 'absent'"
 
 - include: 'sysv_cleanup.yml'
-  when: ansible_distribution in ('RHEL', 'CentOS', 'ScientificLinux')
+  when: ansible_distribution in ['Redhat', 'CentOS', 'ScientificLinux']
 - include: 'systemd_cleanup.yml'
   when: ansible_distribution == 'Fedora'
 - include: 'upstart_cleanup.yml'

test/integration/roles/test_yum/tasks/main.yml

@@ -17,5 +17,5 @@
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 
 - include: 'yum.yml'
-  when: ansible_distribution in ('RHEL', 'CentOS', 'ScientificLinux', 'Fedora')
+  when: ansible_distribution in ['RedHat', 'CentOS', 'ScientificLinux', 'Fedora']