Update jaeger-ui to use memoization for getConfig (#2732)
Update jaeger-ui to use memoization for getConfig (#2732)

Signed-off-by: Mykhailo Semenchenko <adeab6784922a2b265879b25731325ebf4fbc14e@logz.io>
jpkrohling/jaeger,jaegertracing/jaeger,pavolloffay/jaeger,pavolloffay/jaeger,uber/jaeger,jaegertracing/jaeger,jaegertracing/jaeger,uber/jaeger,uber/jaeger,jpkrohling/jaeger,jaegertracing/jaeger,jaegertracing/jaeger,uber/jaeger,jpkrohling/jaeger,pavolloffay/jaeger,pavolloffay/jaeger,pavolloffay/jaeger,jpkrohling/jaeger,jpkrohling/jaeger