[fix bug 1254173] Use get_or_create for skill creation.
[fix bug 1254173] Use get_or_create for skill creation.

mozilla/mozillians,fxa90id/mozillians,mozilla/mozillians,johngian/mozillians,johngian/mozillians,mozilla/mozillians,fxa90id/mozillians,fxa90id/mozillians,fxa90id/mozillians,akatsoulas/mozillians,akatsoulas/mozillians,johngian/mozillians,akatsoulas/mozillians,akatsoulas/mozillians,johngian/mozillians,mozilla/mozillians