B2OC: store isolation variables instead of tracks

Can confirm the info is correctly saved by dumping a random event of

TUBRO stream:

/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_DeltaR_05_NeutralIsolation
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_DeltaR_05_NeutralIsolation/P2InfoRelations
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_DeltaR_10_NeutralIsolation
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_DeltaR_10_NeutralIsolation/P2InfoRelations
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_DeltaR_05_LongTrackIsolation
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_DeltaR_05_LongTrackIsolation/P2InfoRelations
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_DeltaR_10_LongTrackIsolation
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_DeltaR_10_LongTrackIsolation/P2InfoRelations
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_DeltaR_15_NeutralIsolation
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_DeltaR_15_NeutralIsolation/P2InfoRelations
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_DeltaR_15_LongTrackIsolation
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_DeltaR_15_LongTrackIsolation/P2InfoRelations
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_VertexIsolation
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/B0_VertexIsolation/P2InfoRelations
/Event/Turbo/Hlt2B2OC_BuToDstpKK_DstpToD0Pi_D0ToHH/Particles

FULL stream:

/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_VertexIsolation
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_VertexIsolation/P2InfoRelations
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_DeltaR_15_NeutralIsolation
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_DeltaR_15_NeutralIsolation/P2InfoRelations
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_DeltaR_15_LongTrackIsolation
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_DeltaR_15_LongTrackIsolation/P2InfoRelations
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_DeltaR_10_NeutralIsolation
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_DeltaR_10_NeutralIsolation/P2InfoRelations
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_DeltaR_10_LongTrackIsolation
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_DeltaR_10_LongTrackIsolation/P2InfoRelations
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_DeltaR_05_NeutralIsolation
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_DeltaR_05_NeutralIsolation/P2InfoRelations
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_DeltaR_05_LongTrackIsolation
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/B0_DeltaR_05_LongTrackIsolation/P2InfoRelations
/Event/Spruce/SpruceB2OC_BuToDspGamma_DspToHHH/Particles