This is much faster, eg defining a max function is about 39 times faster and
even more on more complicated code:

$ python -mtimeit -s 'code = "def max(a, b): return a > b and a or b"' 'exec code'
10000 loops, best of 3: 25.2 usec per loop
$ python -mtimeit -s 'code = compile("def max(a, b): return a > b and a or b", "<string>", "exec")' 'exec code'
1000000 loops, best of 3: 0.632 usec per loop

Another reason is for traceback/pdb readability as __file__ is displayed in
the backtrace, but with 'exec' __file__ equals to '<string>', compile() allows
to specify a readable name easily without having to override __file__.

Also, set __file__ to the Component relative URL instead of the ID for
readability sake.

Signed-off-by: Julien Muchembled <jm@nexedi.com>

Fixes unittest.expectedFailure usage, allowing phasing out
backportUnittest gradually (at least for the backport part).

because they raise "The operation is insecure" error in recent Firefox.

- It causes the movements to be created in another delivery if the start/stop dates are different from invoice date

The code wrongly assumed that the .py file (containing source code of a
Component) was on the filesystem upon import but importing from an archive
uses tarfile and does not extract anything...

Get rid of refactoring/convention/spurious messages (ERP5 Naming Convention
may be added later on). Also, Pylint cannot deal with dynamic accessor/module
generation, so disable these error messages as well.

Also, patch pylint to handle try/except for modules imports
(https://www.logilab.org/ticket/9386).

Likewise Pylint, compile() has no side effects as it juste compile source into
a code object which may be passed to 'exec'.

Pylint should be enough and has no side effects...

and remove AccountingTransactionLine_getParentUrl which is not used

This reverts commit 5ec2f886.