Use 'package_facts' module in firewall role

Centos iso image doesn't have 'yum-utils' package with
'repoquery' binary which causes 'yum' module to crash.
Using more generic 'package_facts' fixes that.

This patch also introduces more general compatibility with
RedHat/Debian based distros.

Issue-ID: OOM-1632

Change-Id: Ica026c0f9a9ffa9e307f7cba589900962b0db4e7
Signed-off-by:  Bartek Grzybowski <b.grzybowski@partner.samsung.com>
diff --git a/ansible/roles/firewall/defaults/main.yml b/ansible/roles/firewall/defaults/main.yml
new file mode 100644
index 0000000..7cc9ae9
--- /dev/null
+++ b/ansible/roles/firewall/defaults/main.yml
@@ -0,0 +1,6 @@
+---
+firewall:
+  state: disable
+  package_name:
+    RedHat: 'firewalld'
+    Debian: 'ufw'