Node.js agent v1.25.5

Fixes

• Added instrumentation of Bluebird promises.

  Previously, the transaction state could get lost when multiple promises resolved close to each other.

• Fixed issue with PostgreSQL native instrumentation.

  Previously, calling require('pg').native more than once was causing the agent to crash.

• Fixed issue with hapi instrumentation not returning value from Server.connection().

• Various improvements to tests to make them more stable.