Remove org.json:json and fix gwt-dev deps

GWT 2.7 dev JAR no longer lists org.json:json as a dep in its pom.xml
file.  Instead it requests ow2-asm.  Fix the dep list to drop the
difficult org.json:json and put in the requested ow2 JARs.

Move ow2-asm deps down onto gwt-dev JAR where they belong.  These are
required by the compiler code inside gwt-dev, not user code linked
with gwt_module().

Change-Id: I54df92daf40d77e61bed4ed4b549981e8d798ca1
(cherry picked from commit b0735a3c02fd930699176b54a0a99f0861272ad4)
5 files changed