ns tests: improve log verification

[dtopuzov]

The problem:
If we have a lot of chunks (which happens in NG apps) we print Successfully transferred all files on device instead of all bundle.* chunks.
At the moment we have not way good way to detect when files are too much and when not.

Solution:
TnsLogs.run_messages() to have option to check if Successfully transferred all files on device or something else is present.
No idea how we can do it, may be it will be related with major refactoring of TnsLogs.run_messages().

Verification removed because of this issue:
#113