Misc test fixes

Remove TestAll.mvcc

Forbid reconnects in non-regular modes in TestScript

disabled reconnection (big) in TestScript until issues are resolved

Enable MULTI_THREADED by default for MVStore mode

fix for TestScript ERROR: org/h2/test/scripts/ddl/dropSchema.sql:46 - synonym is created within wrong schema

Use MySQL-compatible conversion between CHAR and BINARY in MySQL mode (part 2)

Use MySQL-compatible conversion between CHAR and BINARY in MySQL mode

Fix or suppress errors in tests

enable TestRandomSQL on non-memory databases

TestKillRestartMulti: A map named undoLog-1 already exists

we should probably just delete this 1.1 upgrade stuff

in pagestore mode we scale it by the size of available RAM

unused methods removed
min0r refactoring

otherwise we're not actually testing what we want to test, and it's darn hard to track down bugs in the test code