Add role level tests for 'nginx' role

Introduce full role level test coverage for
'nginx' role.

Change-Id: I7c634775433a2336e43cdfc73d4698d5e2933f0e
Issue-ID: OOM-1913
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
diff --git a/ansible/roles/nginx/.yamllint b/ansible/roles/nginx/.yamllint
new file mode 100644
index 0000000..ad0be76
--- /dev/null
+++ b/ansible/roles/nginx/.yamllint
@@ -0,0 +1,11 @@
+extends: default
+
+rules:
+  braces:
+    max-spaces-inside: 1
+    level: error
+  brackets:
+    max-spaces-inside: 1
+    level: error
+  line-length: disable
+  truthy: disable