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/pipe.yml

@@ -0,0 +1,20 @@
+# Note: Pipe handlers are also tested and used as part of basic main.yml coverage
+- name: Configuring a handler with missing pipe parameters should fail
+  sensu_handler:
+    name: "pipe"
+    type: "pipe"
+  register: failure
+  ignore_errors: true
+
+- name: Assert that configuring a handler with missing pipe parameters fails
+  assert:
+    that:
+      - failure | failed
+      - "'the following are missing: command' in failure['msg']"
+
+- name: Configure a handler with pipe parameters
+  sensu_handler:
+    name: "pipe"
+    type: "pipe"
+    command: "/bin/bash"
+  register: handler