Enable the signing of the archives to be marked as not required if -PskipSigning=true commandline property is specified
Enable the signing of the archives to be marked as not required if -PskipSigning=true commandline property is specified

Signed-off-by: Gary Brown <f9023000f29773649f3850298becb9544b5fd6a9@brownuk.com>

uber/jaeger-client-java,uber/jaeger-client-java