avocado.core.output: View() -> change list_mode to use_paginator

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
avocado: Change param record_stream_files to allow_output_check

After review, we settled in 'allow_output_check' rather than
'record_stream_files', since we are allowing some of the output
streams of the program to be checked. Also, in order to make
the feature easier to use, turn it on by default (set
allow_output_check=True by default).

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
avocado.plugins.runner: Change behavior of --output-check-record, add --disable-output-check

Make 'none' the default for --output-check-record, and
add --disable-output-check, for when you don't check the
test expected outputs for some reason (you are running on
a machine that makes your test output to behave differently, but
you still want to do the rest of the test.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>