Draft: Jet Hypo - add optimisation for for dijet chains

Improve performance for dijet chains by recognising when the Conditions for the child jets are identical. Improver performance for AcceptAll Conditions with a single child

@peter

assigned to @peter

added 1 commit

• 0f08435d - jet hypo unit tests - update the unit tests

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• ac0b0581 - jet hypo - remove commented out code

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merged