RFR: JDK-8188035: JavaFileManager.listLocationsForModules does not always reflect values set through tandardJavaFileManager.setLocationForModule.

[Jan Lahoda]

Hi,

When StandardJavaFileManager.setLocationForModule is used, and then 
JavaFileManager.listLocationsForModules is used, then, for some 
locations, the listed locations won't include the changes through 
setLocationForModule. The proposal here is to prepend the 
paths/locations from setLocationForModule invocations to the output of 
listLocationsForModules.

Bug: https://bugs.openjdk.java.net/browse/JDK-8188035
Webrev: http://cr.openjdk.java.net/~jlahoda/8188035/webrev.00/

Jan