Update for VisualVM 2.0

[jisedlac]

VisualVM 2.0 has been released and does not support plugins for VisualVM 1.x.

You may want to update the TDA plugin for VisualVM 2.0. Changing imports from com.sun.tools.visualvm.* to org.graalvm.visualvm.* and updating dependency versions should be enough.

I'm ready to provide any assistance if needed.

[irockel]

Updated tda integration to Visual VM 2.0, changed minimum jdk used inside TDA to 1.8. Will provide new nbms to you when maintenance release 2.4 is ready.

[irockel]

Issue for VisualVM Release: oracle/visualvm#224

[jisedlac]

We've tested the VisualVM modules and found two minor issues. Could you please address them before releasing on the VisualVM Plugin Center?

1. Currently two modules would be visible on the Plugin Center: VisualVM-TDA-Module and VisualVM-Logfile-Module. Would be better if only the first module was visible to the user - it represents the whole plugin from the user's perspective
   

2. The TDA Options category should display at the end, after the standard VisualVM categories. Consider using TDA instead of the full name to keep the item small, but this is up to you - not a requirement.
   

[irockel]

Adjusted plugin configuration as requested. The plugin files in the 2.4 release are updated with the changes.

[jisedlac]

Verified, thanks!