Update JavaRegression test to run inside the EDT

Hopefully this should solved the issue when the window get created
on Mac and the system doesn't want to provide it.

Change-Id: I19d5e48a492009ef4c901ef263588748bbfbb3c2
Merge topic 'java-regression-test' into master

44d2c23e Update JavaRegression test to run inside the EDT
Fixed test failures and compiler warnings.

Cleaning up minor issue resulting from Plot3DMetaReader commit.

Change-Id: I3fb35dcfb82d1c30e4508e79876f202524cce028
Merge topic 'fixed-warning-and-failure' into master

5c10e777 Fixed test failures and compiler warnings.