Please review fix [2] for jpackage bug [1].
Put `RemoveExistingProducts` action before `CostInitialize` action in
`InstallExecuteSequence` sequence to uninstall existing product(s)
before installer makes changes to the file system.
Existing Wix `MajorUpgrade` elements in main.wxs implicitely add
`RemoveExistingProducts` action to `InstallExecuteSequence` sequence but
not in the required order. Thus all `MajorUpgrade` elements in main.wxs
were replaced with explicitly defined upgrade table.
- Alexey
[1] https://bugs.openjdk.java.net/browse/JDK-8248264
[2] http://cr.openjdk.java.net/~asemenyuk/8248264/webrev.00
