Update POM with new maven repository, yet again

Author: smithkm

geowebcache/pom.xml

@@ -40,7 +40,7 @@
     <repository>
       <id>boundless</id>
       <name>Boundless Maven Repository</name>
-      <url>https://repo.boundlessgeo.com/main</url>
+      <url>http://repo.boundlessgeo.com/main</url>
       <snapshots>
         <enabled>true</enabled>
       </snapshots>