title: How to make ant target to wait for the another target to complete
body: <p>In my selenium grid setup, I have to execute 2 modules initially, which will create data. Then , rest 6 modules paralelly.
  Totally i have 8 targets for 8 different modules in build.xml.I have to make all 6 targets wait for initial 2 targets to complete.
  1. How can i make ant target wait for the rest two targets to complete execution?
  2.If i break build.xml into 2 build.xmls, which command makes 2 build files to run sequentially?</p>