Revert versioning changes to the Experimental NBM

Experimental/manifest.mf

 Manifest-Version: 1.0
 AutoUpdate-Show-In-Client: true
-OpenIDE-Module: org.sleuthkit.autopsy.experimental/10
-OpenIDE-Module-Implementation-Version: 2
+OpenIDE-Module: org.sleuthkit.autopsy.experimental
 OpenIDE-Module-Layer: org/sleuthkit/autopsy/experimental/autoingest/layer.xml
 OpenIDE-Module-Localizing-Bundle: org/sleuthkit/autopsy/experimental/autoingest/Bundle.properties
 OpenIDE-Module-Specification-Version: 1.0