Fix HAPI test freeze timing bug

Current HAPI tests sometimes set the freeze time in the state too near in the future. When this happens, the consensus layer does not freeze properly and causes an ISS after upgrade. These ISSes are currently suppressed due to a configuration override setting in the dev environment: `event.preconsensus.forceIgnorePcesSignatures=true`

For the tests to be valid, they must freeze the node properly. The setting should be reverted, and the freeze time should be set a bit further in the future to prevent the ISSes.