Revert "Correcting install4j version string"

This reverts commit 3086c579b3cc35a33ebb4b9c2351cdc134bb8a25.
Revert "Updating expected cert file location on Mac OS"

This reverts commit 1ea66223897fc55354b57d429a024a9c09acba6c.
Revert "Bumping install4j to version 5.1.5; auto-signing for Mac"

This reverts commit 0e971c599daec234bedea5ec5673689c0bb2035c.
Updating Install4J to 5.1.5