[IMP] tools: add a profiler for odoo performance analysis

Use ``profile`` to decorate an entry point method.
If ``profile`` is used without params, log as shallow mode else log
all methods for all odoo models by applying the optional filters.

:param whitelist: None or list of model names to display in the log
                 (Default: None)
:type whitelist: list or None
:param files: None or list of filenames to display in the log
                (Default: None)
:type files: list or None
:param list blacklist: list model names to remove from the log
                (Default: remove non odoo model from the log: [None])
:param int minimum_time: minimum time (ms) to display a method
                (Default: 0)
:param int minimum_queries: minimum sql queries to display a method
                (Default: 0)

.. code-block:: python

  from odoo.tools.profiler import profile

  class SaleOrder(models.Model):
    ...

    @api.model
    @profile                    # log only this create method
    def create(self, vals):
    ...
    @api.multi
    @profile()                  # log all methods for all odoo models
    def unlink(self):
    ...
    @profile(whitelist=['sale.order', 'ir.model.data'])
    def action_quotation_send(self):
    ...
    @profile(files=['/home/openerp/odoo/odoo/addons/sale/models/sale.py'])
    def write(self):
    ...

NB: The use of the profiler modifies the execution time

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