Revert "Set 3.4.2 on Ignite examples"
Revert "Set 3.4.2 on Ignite examples"

This reverts commit e0aa1f9fbe6568668e2b70e71113e0a749ddc96e.

vert-x3/vertx-examples,vert-x3/vertx-examples,vert-x3/vertx-examples,vert-x3/vertx-examples,vert-x3/vertx-examples