Optimizing ConditionAndOr queries

Added test case

convert ((A=1 AND B=2) OR (A=1 AND B=3)) to (A=1 AND (B=2 OR B=3))
-Suggested changes in:
https://github.com/h2database/h2database/pull/1571#discussion_r235925138
https://github.com/h2database/h2database/pull/1571#discussion_r235925223

convert ((A=1 AND B=2) OR (A=1 AND B=3)) to (A=1 AND (B=2 OR B=3))

Add ANY, UNNEST, and fix SOME parsing

Defrag OOM

Refactor Expression implementations

Assorted minor changes

increase lock timeout to TestConcurrentUpdate due to Travis failures

In the REGEXP_REPLACE function, when in PostgreSQL compatibility mode, accept the 'g' flag.

Create local variable for whether we're in PostgreSQL mode, remove implementation details from doco, add compiler/IDE hint for falling-through switch statement