Need to change the default timeout for httprequest on windows

[huguesv]

The default timeouts for winhttp are not large enough for some operations.

For example, when reading from service bus, it is possible to give azure a timeout to wait for availability of a message in the queue (let's say 40 secs). If that timeout is larger than the winhttp timeout (30 secs), you'll get a timeout error from winhttp after 30 secs.

There is a limitation of 60 secs for any Azure calls through http:

"When using http, the load balancer will kill any connection after a minute of inactivity. "

So we can probably just set the timeouts to 60-70 secs.