Duplicated Resource have been added to the Set<Resource> bundlesInRegion during compute

When install a custom feature (e.g CXF jaxws service) into Karaf 4.2.4, there are Duplicated Resource have been added to the Set<Resource> bundlesInRegion during compute.

The output from L1344 of https://github.com/apache/karaf/blob/karaf-4.2.4/features/core/src/main/java/org/apache/karaf/features/internal/service/Deployer.java#L1344

[..., org.eclipse.jetty.http/9.4.12.v20180830, ..., org.eclipse.jetty.http/9.4.12.v20180830, ...]

Then the only the first "org.eclipse.jetty.http/9.4.12.v20180830" will be removed from "toDeploy" List. Consequently, the "org.eclipse.jetty.http/9.4.12.v20180830" has been installed unexpected.

Installing bundles:
   mvn:org.example.myprj.route/DemoRESTRoute/0.1.0
   mvn:org.eclipse.jetty/jetty-http/9.4.12.v20180830

To fix it, have to override the equals() and hashCode() from https://github.com/apache/felix/blob/trunk/utils/src/main/java/org/apache/felix/utils/resource/ResourceImpl.java
(Fix it on Felix side)

Or maybe something can be improved in SubsystemResolver.getBundlesPerRegions()?