implement timeout (or react to exceptions), issue #10

[stefanbesler]

This pull requests solves the issue that is mentioned in issue #10 .

• An additional option to specify a timeout for the process is implemented. I observed that the automation interfaces does not perform particularly well on system with low RAM. Even though a potential fix was provided in issue #5 , the problem still occurs from time to time. If a timeout is provided, a user of TcUnit-Runner can implement a retry(x) {} step in Jenkins to keep the butler happy.

• During testing we are now monitoring the AdsState for all PLC ports that are used in the solution. If any of them is not AdsState.Run the process is terminated. TcUnit-Runner prepares an environment where the AdsState should be AdsState.Run and if it is not the case, this is an indication for a TwinCAT issue (no license activated, PLC Exception).

I tested the implementation with my setup, but more testing on your side, @sagatowski would be appreciated.

[stefanbesler]

I created a new pull request, I accidentally committed with my bot user account ...