Added antrun plugin in pom.xml to execute "ant -f javadoc.xml clean all" from Maven.
Added antrun plugin in pom.xml to execute "ant -f javadoc.xml clean all" from Maven.

kasemir/org.csstudio.display.builder,kasemir/org.csstudio.display.builder,kasemir/org.csstudio.display.builder,ESSICS/org.csstudio.display.builder,kasemir/org.csstudio.display.builder,ESSICS/org.csstudio.display.builder,ESSICS/org.csstudio.display.builder,kasemir/org.csstudio.display.builder,ESSICS/org.csstudio.display.builder,ESSICS/org.csstudio.display.builder