Add sensu_handler Ansible module

This provides a sensu_handler module in order to be able to dynamically
configure a Sensu handler.

test/integration/targets/sensu_handler/tasks/tcp.yml

@@ -0,0 +1,52 @@
+- name: Configuring a handler with missing tcp parameters should fail
+  sensu_handler:
+    name: "tcp"
+    type: "tcp"
+  register: failure
+  ignore_errors: true
+
+- name: Assert that configuring a handler with missing tcp parameters fails
+  assert:
+    that:
+      - failure | failed
+      - "'the following are missing: socket' in failure['msg']"
+
+- name: Configure a tcp handler
+  sensu_handler:
+    name: "tcp"
+    type: "tcp"
+    socket:
+      host: 127.0.0.1
+      port: 8000
+  register: handler
+
+- name: Retrieve configuration file stat
+  stat:
+    path: "{{ handler['file'] }}"
+  register: handler_stat
+
+- name: Validate tcp handler return data
+  assert:
+    that:
+      - "handler | success"
+      - "handler | changed"
+      - "handler_stat.stat.exists == true"
+      - "handler['name'] == 'tcp'"
+      - "handler['file'] == '/etc/sensu/conf.d/handlers/tcp.json'"
+      - "handler['config']['type'] == 'tcp'"
+      - "handler['config']['socket']['host'] == '127.0.0.1'"
+      - "handler['config']['socket']['port'] == 8000"
+      - "handler['config']['handle_flapping'] == false"
+      - "handler['config']['handle_silenced'] == false"
+
+- name: Assert that the handler configuration file is actually configured properly
+  vars:
+    config: "{{ lookup('file', handler['file']) | from_json }}"
+  assert:
+    that:
+      - "'tcp' in config['handlers']"
+      - "config['handlers']['tcp']['type'] == 'tcp'"
+      - "config['handlers']['tcp']['socket']['host'] == '127.0.0.1'"
+      - "config['handlers']['tcp']['socket']['port'] == 8000"
+      - "config['handlers']['tcp']['handle_flapping'] == false"
+      - "config['handlers']['tcp']['handle_silenced'] == false"