investigate multiple applets on the same page using DT to install JRE or FX

Current implementation of Deploy toolkit may not be able to handle install status reporting when multiple applets on the same page requesting install of a JRE or FX.

e.g. it may not handle the case when multiple applets on the same page
 requesting a install of FX version X. Say applet A is deployed
 without install javascript callback and applet B on the same page
 want to use the same JRE and has install callback. B will not know
 about FX version X is being installed.