Hooked RxJavaPlugins errorHandler up within all operators that swallow onErrors.
* Otherwise, the only onErrors visible to plugin are the ones which propagate all the way to SafeSubscriber.
Remove call to RxJavaPlugins ErrorHander in mergeDelayError operator - CompositeException is already visible
Merge pull request #1306 from mattrjacobs/add-error-handler-to-error-swallowing-operators

Hooked RxJavaPlugins errorHandler up within all operators that swallow onErrors