Upgrade memoryoptions properties in org.jboss.tools:parent to Java 8

There are memoryoptions1 and memoryoptions2 properties in https://github.com/jbosstools/jbosstools-build/blob/master/parent/pom.xml#L33-L34 which are ignored in Java 8 - instead there are options if you need to set it up like:

• -XX:MetaspaceSize for initial size
• -XX:MaxMetaspaceSize for maximum size (it is not required as the value is by default the max memory on runnning machine.

Otherwise just remove them.