Validate updates to MANIFEST.MF in 4.8.0 release.

[kataggart]

The PR to bump manifest versions for OSGI could not be tested prior to merge. This is due to the fact that the changes to the MANIFEST.MF occur only during an official release draft or official release build. This ticket is to ensure Liquibase Internal QA validates the version updates.

[XDelphiGrl]

Our change in build systems and philosophy resulted in the unintentional mis-versioning in the MANIFEST.MF. This fix addresses that mis-versioning. @nvoxland added a script that validates there are no 0-SNAPSHOT or 0.0.0-SNAPSHOT versions in the MANIFEST.MF. This will run at the end of release (internally by Liquibase engineering).

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Verify there are no references to 0-SNAPSHOT in MANIFEST.MF PASS
Verify there are no references to 0.0.0-SNAPSHOT in MANIFEST.MF PASS
Verify Bundle-Version in MANIFEST.MF is 4.8.0. PASS

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Test Environment
liquibase-4.8.0.jar