CORE-2095 Invalid generated changeset for mysql bit with defaultValue 0

Centralized logic for setting the correct defaultValue field in both MissingColumn and MissingTable classes
CORE-1996 addNotNullConstraint on h2 database has unexpected side effects
Need to use sequence function when creating a table with a default value as a sequence value
Improve caching of ChangeLogHistory and LockService state based on pull request https://github.com/liquibase/liquibase/pull/308
Fixes for failing tests
CORE-1922 Sequence is not a reserved object name in HSQLDB