[FIX][account_financial_report_qweb] Fix ImportError.

It was happening when `xlsxwriter` python module was not available.

account_financial_report_qweb/README.rst

@@ -50,6 +50,7 @@ Contributors
 * Francesco Apruzzese <[email protected]>
 * Lorenzo Battistini <[email protected]>
 * Julien Coux <[email protected]>
+* Jairo Llopis <[email protected]>
 
 Much of the work in this module was done at a sprint in Sorrento, Italy in
 April 2016.

account_financial_report_qweb/__init__.py

@@ -2,7 +2,12 @@
 # Author: Damien Crier
 # Copyright 2016 Camptocamp SA
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
-
-from . import models
-from . import wizard
-from . import report
+try:
+    from . import models
+    from . import wizard
+    from . import report
+except ImportError:
+    import logging
+    _logger = logging.getLogger(__name__)
+    _logger.info("ImportError raised while loading module.")
+    _logger.debug("ImportError details:", exc_info=True)