Possibility to customize reporter messages

Added reporterOptions. This provide you a possibility to adjust reporter functionality.

• captureStandardOutput (boolean) — if true, all the standard output (and standard error) messages received between testStarted and testFinished messages will be considered test output. The default value is false and assumes usage of testStdOut and testStdErr service messages to report the test output. Default false.
• flowId (boolean) — if true, flowId property will be added to all messages. Flow tracking is necessary for example to distinguish separate processes running in parallel. Default true.
• message (string) — possibility to provide particular format for the name property. Possible keys: [browser], [title], [hash]. Example, [browser] [title]. Default [title].