assertions are ued. With suite.Required() there are issues in getting
the test results correct.
Instead, use standard assertions and use suite.T().Failed() to do
early returns.
Wrote ChannelReadWriter that simulates a connection inmemory.
This is used by the agentserver test for testing the initialization. The
first test is already working.
* removed the Async utility
* now using Ping message to webclient for keep alive instaed of actual content
* added remote shell to AgentInfo
* retry of connections to the agent
* better logging for SynchronizeStreams
