[Build] Set general test timeout of 20min per test-project

Author: HannesWell

eclipse-platform-parent/pom.xml

@@ -138,6 +138,7 @@
     <surefire.moduleProperties>--add-modules=ALL-SYSTEM</surefire.moduleProperties>
     <!-- system specific JVM args; if needed provided by system properties to the build command -->
     <surefire.systemProperties></surefire.systemProperties>
+    <surefire.timeout>1200</surefire.timeout>
     <java.version>17</java.version>
     <printApiMessages>false</printApiMessages>
     <failOnJavadocErrors>false</failOnJavadocErrors>