Merge pull request #657 from davidcurrie/master

Move websphere-liberty:beta to April release

library/websphere-liberty

@@ -2,4 +2,4 @@
 
 8.5.5: git://github.com/WASdev/ci.docker@dab136acfd77b33ec3b4238b41583b868ec3381f websphere-liberty/8.5.5/developer
 latest: git://github.com/WASdev/ci.docker@dab136acfd77b33ec3b4238b41583b868ec3381f websphere-liberty/8.5.5/developer
-beta: git://github.com/WASdev/ci.docker@dab136acfd77b33ec3b4238b41583b868ec3381f websphere-liberty/beta
+beta: git://github.com/WASdev/ci.docker@29986d2f2e06c73bb5679f3fbb059976c534774e websphere-liberty/beta