[postgres] Instrumentation
[postgres] Trace evented query mode
[tests] First pass at test rewrite.
[tests] Isolate test actions from validation so they can be stood up outside the test suite and verified manually.
[postgres] Truncate long queries and values
[postgres] Bumped max query length to 2048 characters
Merge pull request #9 from appneta/postgres-instrumentation

Support PG
fix merge conflict with master
Merge pull request #12 from appneta/rewrite-tests

Rewrite tests
[postgres] Rewrite tests for new test interface
Merge pull request #15 from appneta/rewrite-postgres-tests

[postgres] Rewrite tests for new test interface
[express] Instrumentation