Add ability to place a call to a SIP URI.
Add ability to receive a SIP call.
Add unit tests for some Client methods.
End calls when disconnect happens.
Merge pull request #211 in STRATOS/transporter from sip-calling-MER-2322-MER-2323 to develop

* commit 'c87c17c9d0deb869ed1ac2bc3c27b33a328f64ad':
  Add unit tests for some Client methods.
  Add ability to receive a SIP call.
  Add ability to place a call to a SIP URI.
Merge pull request #212 in STRATOS/transporter from socket-disconnect-MER-2307 to develop

* commit '4c4b18892359c50e5a2dc8d77eec1273211d592d':
  End calls when disconnect happens.
Remove stats from call debug report.
Change body size limit to 20K; account for doublewidth chars.
Merge pull request #213 in STRATOS/transporter from websocket-limit-MER-2375 to develop

* commit '63b2f12a9e347247ce7148835c87ee041b2c170c':
  Change body size limit to 20K; account for doublewidth chars.
  Remove stats from call debug report.
1.15.0