Add test_serach_command_by_environ_in_command
Add test_serach_command_by_glob_environ_in_command
Add failing tests: environ must lookup session info
Fix test_serach_command_by_*environ_in_session
More fixes to test_serach_command_by_*environ_in_session

It seems exclude_environ_pattern does not work.
So it is commentouted to make the test pass for now.
Add better description of the bug
Merge branch 'test-search-environ'

A bug was found, but it is not relevant to "released" features.