Fixed issues

Release 6.0.1 fixed issues
ID Description
ZEN-29052 Some migrate scripts do not run during a 5.3 to 6.0.0 upgrade.
ZEN-29056 Exception blocks some 5.x to 6.0.0 upgrades.
ZEN-29067 RMMonitor ZenPack does not install properly during a 5.x to 6.0.0 upgrade.
ZEN-29070 Under certain scenarios, writing metrics can print tracebacks.