[CLA] backport signature to 8.0

Done at #16240

doc/cla/corporate/metalsartigan.md

+Canada, 2017-4-4
+
+Métal Sartigan agrees to the terms of the Odoo Corporate Contributor License
+Agreement v1.0.
+
+I declare that I am authorized and able to make this agreement and sign this
+declaration.
+
+Signed,
+
+Jérôme Thériault jerther@gmail.com https://github.com/jerther
+
+List of contributors:
+
+Jérôme Thériault jerther@gmail.com https://github.com/jerther