Updated rolling upgrade 'quick verification' IT test so that it can be used again

(cherry picked from commit 3636952ae2c5d89bf4d3e9917ec3cacca774e103)

Conflicts:
	enterprise/ha/src/test/java/org/neo4j/ha/upgrade/RollingUpgradeIT.java

Fixed some issues with the test itself

(cherry picked from commit 6d5aed4d27520bdb0179356aedf29a8abc05cad3)