Capture the rest of transaction.context.request.url properties

[SergeyKleyman]

According to spec https://github.com/elastic/apm-server/blob/master/docs/spec/request.json we don't capture the following transaction.context.request.url properties:

• port
• pathname
• search
• hash

We need to extend:

• Public API
• Core implementation
• Full Framework implementation

[gregkalapos]

search is done, rest will deferred from 1.1

[gregkalapos]

From #285: env on transaction.context.request should be also added.