setup datadog agent on each host.

- set agent version to 7

ansible-5/roles/datadog.datadog/meta/.galaxy_install_info

@@ -0,0 +1,2 @@
+install_date: Sat 22 Jan 2022 05:30:07 PM
+version: 4.13.0

ansible-5/roles/datadog.datadog/meta/main.yml

@@ -0,0 +1,52 @@
+---
+galaxy_info:
+  role_name: datadog
+  namespace: datadog
+  author: 'Brian Akins, Dustin Brown & Datadog'
+  description: Install Datadog agent and configure checks
+  license: Apache2
+  min_ansible_version: 2.6
+  github_branch: main
+  platforms:
+    - name: Ubuntu
+      versions:
+        - trusty
+        - xenial
+        - artful
+        - bionic
+    - name: Debian
+      versions:
+        - wheezy
+        - jessie
+        - stretch
+        - buster
+    - name: EL
+      versions:
+        - 8
+        - 7
+        - 6
+    - name: opensuse
+      versions:
+        - 12.1
+        - 12.2
+        - 12.3
+        - 13.1
+        - 13.2
+    - name: SLES
+      versions:
+        - 11SP3
+        - 11SP4
+        - 12
+        - 12SP1
+        - 15
+    - name: Windows
+      versions:
+        - 2008x64
+        - 2008R2
+        - 2012
+        - 2012R2
+        - 2016
+        - 2019
+  galaxy_tags:
+    - monitoring
+dependencies: []