RFR: JMC-6115 Use Jemmy builds from Maven Central

[Jie Kang]

Hi,

Please review this fix to use Jemmy dependencies from Maven, removing
the need for users to manually acquire Jemmy (download & compile). The
dependencies now come from the p2 repository and use the updated Jemmy
version 2.0.0. The indentation is also fixed for
application/uitests/org.openjdk.jmc.test.jemmy/pom.xml.

Webrev:
http://cr.openjdk.java.net/~jkang/jmc-6115/webrev.01/
Bug:
https://bugs.openjdk.java.net/browse/JMC-6115


Regards,