service_process_is_running absence will not trump service_up even on rebind

modify service_process_is_running enricher to be better about respecting entities which manually set service_up;
previously it did not change service_up *except* on a rebind; now it should not even change them on a rebind

also switch mysql to support service_process_is_running
jmx agent path is set as a sensor to work across versions

also deprecate a needless inner class (but keep it around for rebinding)
fix bug *listing* in object store when container name is a virtual path

previously if container name contained a /, when listing, all items included container name portions after the initial /.
better test coverage now too.
This closes #348
This closes #344
add comment for code review
This closes #347