Currently the implementation of the CLI (or any Fission component) specifies any timeout on
the fission fn test functionality. If a user function or environment does not specify any
timeout the command will stall. Nor is there any parameter to set a timeout if the user
wanted to.
This change sets the sensible default for the timeout to 30 seconds, to avoid new
users having to figure this out the hard way. The alternative could be to set the timeout to
0 (no timeout).
Future work: extend this timeout parameter to a global flag, and support
timeouts on all CLI commands.
* Added support for --plugin parameter in Fission CLI
This fixes the issue that renaming fission to fission-XYZ would cause a fork bomb, due to the CLI recursively calling itself to discover plugins.
