Fix version_added and snippet imports on new digital ocean modules

cloud/digital_ocean_domain

@@ -21,7 +21,7 @@ module: digital_ocean_domain
 short_description: Create/delete a DNS record in DigitalOcean
 description:
      - Create/delete a DNS record in DigitalOcean.
-version_added: "1.4"
+version_added: "1.6"
 options:
   state:
     description:
@@ -236,7 +236,7 @@ def main():
     except (DoError, Exception) as e:
         module.fail_json(msg=str(e))
 
-# this is magic, see lib/ansible/module_common.py
-#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
+# import module snippets
+from ansible.module_utils.basic import *
 
 main()

cloud/digital_ocean_droplet

@@ -21,7 +21,7 @@ module: digital_ocean_droplet
 short_description: Create/delete a droplet in DigitalOcean
 description:
      - Create/delete a droplet in DigitalOcean and optionally waits for it to be 'running'.
-version_added: "1.4"
+version_added: "1.6"
 options:
   state:
     description:
@@ -314,7 +314,7 @@ def main():
     except (DoError, Exception) as e:
         module.fail_json(msg=str(e))
 
-# this is magic, see lib/ansible/module_common.py
-#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
+# import module snippets
+from ansible.module_utils.basic import *
 
 main()

cloud/digital_ocean_sshkey

@@ -21,7 +21,7 @@ module: digital_ocean_sshkey
 short_description: Create/delete an SSH key in DigitalOcean
 description:
      - Create/delete an SSH key.
-version_added: "1.4"
+version_added: "1.6"
 options:
   state:
     description:
@@ -172,7 +172,7 @@ def main():
     except (DoError, Exception) as e:
         module.fail_json(msg=str(e))
 
-# this is magic, see lib/ansible/module_common.py
-#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
+# import module snippets
+from ansible.module_utils.basic import *
 
 main()