fix(#1247): Added subscriptionEndpointConnectionTimeout option

[fiLLLip]

Forcing timeout to be set value by setting both timeout and minTimeout on the subscription client

Fixes #1247.

Changes proposed in this pull request:

• Add new setting/property subscriptionEndpointConnectionTimeout

[acao]

@fiLLLip thanks for this! it looks like your PR just so happened to clash with one we just merged for global session headers. can you handle this merge conflict now?

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[brianwarner]

FYI, you can ignore the CLAassistant comment. I've disabled it for this repo since we use EasyCLA now.

[fiLLLip]

I did not notice your comment, @acao. I'll try to get around and check it.

@brianwarner I was just about to comment it! Is that something I have so sign?

[brianwarner]

Yeah, the EasyCLA bot should run when you push your next commit and prompt you to sign the current documents. This one was just out of date.