IDE-313 IDE Install should uninstall previous 4.x.x versions

Fixes IDE-313

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #148 from GordonSmith/IDE-313

IDE-313 IDE Install should uninstall previous 4.x.x versions

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>
Graph Control 4.0.2-rc3 Release Candidate 3

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge remote-tracking branch 'origin/candidate-4.0.2' into closedown-4.0.x

Conflicts:
	version.cmake

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>