Fixes maven_artifact - verify_md5 only called for SNAPSHOT

* fixed https://github.com/ansible/ansible-modules-extras/issues/2066

* fixes https://github.com/ansible/ansible-modules-extras/issues/2066

packaging/language/maven_artifact.py

@@ -202,7 +202,10 @@ class MavenDownloader:
             buildNumber = xml.xpath("/metadata/versioning/snapshot/buildNumber/text()")[0]
             return self._uri_for_artifact(artifact, artifact.version.replace("SNAPSHOT", timestamp + "-" + buildNumber))
         else:
-            return self._uri_for_artifact(artifact)
+            if artifact.version == "latest":
+                artifact.version = self._find_latest_version_available(artifact)
+
+            return self._uri_for_artifact(artifact, artifact.version)
 
     def _uri_for_artifact(self, artifact, version=None):
         if artifact.is_snapshot() and not version:
@@ -331,10 +334,7 @@ def main():
     prev_state = "absent"
     if os.path.isdir(dest):
         dest = dest + "/" + artifact_id + "-" + version + "." + extension
-    if os.path.lexists(dest):
+    if os.path.lexists(dest) and downloader.verify_md5(dest, downloader.find_uri_for_artifact(artifact) + '.md5'):
-        if not artifact.is_snapshot():
-            prev_state = "present"
-        elif downloader.verify_md5(dest, downloader.find_uri_for_artifact(artifact) + '.md5'):
         prev_state = "present"
     else:
         path = os.path.dirname(dest)