Port maven_artifact from community.general

Author: guidograzioli

README.md

@@ -24,6 +24,7 @@ This collection has been tested against following Python versions: **>=3.6**.
 
 * `product_download`: downloads products from the JBoss Network API
 * `product_search`: searches products from the JBoss Network API
+* `maven_artifact`: downloads an Artifact from a Maven Repository
 * `xml`: manage bits and pieces of XML files or strings
 
 ### Filters