Merge pull request #6338 from jburel/testng

bump TestNG to 7.5.0

Author: jburel

etc/omero.properties

@@ -197,7 +197,7 @@ versions.janino=2.5.10
 
 versions.reportng=1.1.1
 
-versions.testng=6.14.2
+versions.testng=7.5
 versions.velocity=1.4
 
 versions.omero-pypi=https://pypi.io/packages/source/o/PACKAGE