Remove tmp dir from config

[mmcc007]

Use tmp dir returned from os instead of specifying in config file.

@mmcc007 thanks you for your help, it was configured to return table. Have change it to json, but now i'm running into another issue. Maybe you can give me some advice?

The exception I'm running into is the following:

Starting Sylph run 'sylph run 2020-03-18 20:34:05.781' on AWS Device Farm ... Config file: sylph.yaml Unpacking sylph resources to ./tmp/sylph Creating test bundle for upload... Unhandled exception: Invalid argument(s): Cannot copy from . to ./tmp/sylph/test_bundle/flutter_app #0 _doNothing (package:sylph/src/base/copy_path.dart:15:5) #1 copyPathSync (package:sylph/src/base/copy_path.dart:56:7) #2 LocalPackageManager.copy (package:sylph/src/base/local_packages.dart:104:7) #3 bundleFlutterTests (package:sylph/src/bundle.dart:31:23) #4 sylphRun (package:sylph/src/sylph_run.dart:59:3) <asynchronous suspension> #5 run (file:///Users/angela/flutter/.pub-cache/hosted/pub.dartlang.org/sylph-0.7.2/bin/main.dart:97:35) <asynchronous suspension> #6 main.<anonymous closure> (file:///Users/angela/flutter/.pub-cache/hosted/pub.dartlang.org/sylph-0.7.2/bin/main.dart:62:13) #7 AppContext.run.<anonymous closure> (package:tool_base/src/base/context.dart:154:29) #8 _rootRun (dart:async/zone.dart:1126:13) #9 _CustomZone.run (dart:async/zone.dart:1023:19) #10 _runZoned (dart:async/zone.dart:1518:10) #11 runZoned (dart:async/zone.dart:1465:12) #12 AppContext.run (package:tool_base/src/base/context.dart:153:18) #13 runInContext (package:sylph/src/context_runner.dart:11:24) #14 main (file:///Users/angela/flutter/.pub-cache/hosted/pub.dartlang.org/sylph-0.7.2/bin/main.dart:61:11) #15 _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:299:32) #16 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)

Originally posted by @AnzhelaAninian in #95 (comment)