Core: Java exitBlockOnFail syntax is different from all the other methods (BREAKING)

[slandelle]

Currently, we have:

exitBlockOnFail(
  http("name").get("/")
);

while all the other methods look like:

uniformRandomSwitch().on(
  http("name").get("/")
);
roundRobinSwitch().on(
  http("name").get("/")
);
forever().on(
  http("name").get("/")
);
repeat(5).on(
  http("name").get("/")
);

This is not consistent, we should change into:

exitBlockOnFail().on(
  http("name").get("/")
);