java.lang.UnsupportedOperationException when a hosted capability is being inserted by the resolver.

This is similar to ARIES-1439. There are two resolve contexts in subsystems. One is used for the "real" resolution of a subsystem at start time. This is used for all subsystems and the one that was modified in that other issue. The second one is used in order to calculate the dependencies of a subsystem as part of installation. This one is only used for applications and features since composites explicitly define their sharing policies.

Although, based on FELIX-4727, the resolver will be updated to implement the optional add() method, there are releases out there that don't. The same change made in ARIES-1439 should be made in the second resolve context for consistency and to avoid any issues.

Caused by: java.lang.UnsupportedOperationException
at org.apache.felix.resolver.util.CopyOnWriteList.add(CopyOnWriteList.java:135)
at org.apache.aries.subsystem.core.internal.DependencyCalculator$ResolveContext.insertHostedCapability(DependencyCalculator.java:86)
at org.apache.felix.resolver.Candidates.prepare(Candidates.java:934)
at org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:232)
at org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:158)
at org.apache.aries.subsystem.core.internal.DependencyCalculator.calculateDependencies(DependencyCalculator.java:163)
at org.apache.aries.subsystem.core.internal.RawSubsystemResource.computeRequirements(RawSubsystemResource.java:447)
at org.apache.aries.subsystem.core.internal.RawSubsystemResource.<init>(RawSubsystemResource.java:138)
at org.apache.aries.subsystem.core.internal.SubsystemResource.<init>(SubsystemResource.java:91)
at org.apache.aries.subsystem.core.internal.InstallAction.run(InstallAction.java:54)