Merge Bug: Missing Emissions

[benjchristensen]

Notes and temporary fix using synchronized to achieve correctness until a proper solution can be found.

This code does not exhibit the issue when I do production testing. Without the two synchronized methods I get errors in prod that I've temporarily added to BlockingOperatorToIterator until this is fixed so it's visible.

/apps/tomcat/logs$ tail -f catalina.out |grep "Timed out waiting for value"
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava
Timed out waiting for value. File a bug at github.com/Netflix/RxJava

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