Switch from \onehalfspace environment to \onehalfspacing command

Fixes miktex issue (user error) as described in latex3/hyperref#315

FormatAndDefsThesisExtra.tex

@@ -7,7 +7,7 @@
 % except for indented quotations or footnotes where single spacing may
 % be used."
 \usepackage{setspace}
-\onehalfspace
+\onehalfspacing
 
 % Draft note
 % No draft note (empty one) by default
@@ -217,4 +217,4 @@
 urlcolor=linkcol, %couleur des liens pour les url
 pdfkeywords={keyword 1, keyword 2},
 pdfsubject={PhD Thesis}
-}
+}