Supress shutdown ui errors

Signed-off-by: Adam Wisniewski <awisniew@us.ibm.com>

Author: awisniew90

tests/pom.xml

@@ -39,6 +39,7 @@
                     <providerHint>junit5</providerHint>
                     <trimStackTrace>false</trimStackTrace>
                     <runOrder>alphabetical</runOrder>
+                    <appArgLine>-clearPersistedState</appArgLine>
                     <systemProperties>
                         <org.eclipse.swtbot.search.timeout>20000</org.eclipse.swtbot.search.timeout>
                         <io.liberty.tools.eclipse.tests.mvn.logfile>${mvnLogFile}</io.liberty.tools.eclipse.tests.mvn.logfile>