Refactored using
find . -type f -name "*.java" |\
xargs sed -i -E |\
's/\.createStanzaCollectorAndSend\((\w+)\)\.nextResultOrThrow\(\);/.sendIqRequestAndWaitForResponse(\1);/'
and some manual refactoring.
This also removes the powermock dependency. Although powermock is a
fine library, it currently prevents dropping Junit4. And since we only
use the Whitebox API of powermock, this simply replaced powermock's
Whitebox with our own.