cubicweb #3059327 testlib ValueGenerator is missing generate_bigint [validation pending]

leading to AttributeError for automatic test on a schema using BigInt

prioritynormal
typebug
done in3.17.5
load0.100
load left0.000
closed by#c99e97e9f566 [testing] add missing generate_bigint method to ValueGenerator. Closes #3059327
patch[testing] add missing generate_bigint method to ValueGenerator. Closes #3059327 [applied]