cubicweb-blog #3071887 upgrade to 3.17 [validation pending]

For now, the cube's tests are broken on 3.17 dut to the extraction of the sioc cube. Make blog depends on 3.17 to fix this.

prioritynormal
typebug
done in1.10.0
load left0.000
closed by#7629dfa69b76 [test] fix tests with cubicweb 3.17 (closes #3071887)
patchfix tests [applied]