B2OC: Tuning of the DToKsHH builder (shifters please ignore)

Cut tuning to solve the max. combination issue with the D0ToKsHH builder.

1. require IPCHI2 > 6 for all pions or kaons from D (this will affect all lines with D -> Ks h h)
2. tighten PID cut for BuToD0H, D0ToKsHH lines: was pi_pidk_max=20, k_pidk_min=-10, now pi_pidk_max=10, k_pidk_min=-5 (PIDK cut of kaon equals to the default value)
3. remove MVA cut of BuToD0H, D0ToKsHH lines. (now a cut of 0.2 is applied by default)

Rate of affected lines before this fix:

>     LAZY_AND: Hlt2B2OC_BcToDstD0_DstToD0Pi_D0ToHH_D0ToKsLLHH                                                #=146344  Sum=1           Eff=|(0.0006833215 +- 0.000683319)%|
>     LAZY_AND: Hlt2B2OC_BdToD0KK_D0ToKsLLHH                                                                  #=146344  Sum=6           Eff=|(0.004099929 +- 0.00167375)%|                                                                                                                                                                                                  
>     LAZY_AND: Hlt2B2OC_BdToD0KPi_D0ToKsLLHH                                                                 #=146344  Sum=8           Eff=|(0.005466572 +- 0.00193267)%|
>     LAZY_AND: Hlt2B2OC_BdToD0PiPi_D0ToKsLLHH                                                                #=146344  Sum=5           Eff=|(0.003416607 +- 0.00152793)%|
>     LAZY_AND: Hlt2B2OC_BuToD0Pi_D0ToKsLLHH                                                                  #=146344  Sum=1           Eff=|(0.0006833215 +- 0.000683319)%|
>     LAZY_AND: Hlt2B2OC_LbToD0PKWS_D0ToKsLLHH                                                                #=146344  Sum=1           Eff=|(0.0006833215 +- 0.000683319)%|
>     LAZY_AND: Hlt2B2OC_LbToD0PK_D0ToKsLLHH                                                                  #=146344  Sum=2           Eff=|(0.001366643 +- 0.000966356)%|
>     LAZY_AND: Hlt2B2OC_LbToD0PK_D0ToKsTTHH                                                                  #=146344  Sum=13          Eff=|(0.008883179 +- 0.00246364)%|
>     LAZY_AND: Hlt2B2OC_LbToD0PPi_D0ToKsLLHH                                                                 #=146344  Sum=5           Eff=|(0.003416607 +- 0.00152793)%|
>     LAZY_AND: Hlt2B2OC_LbToD0PPi_D0ToKsTTHH                                                                 #=146344  Sum=14          Eff=|(0.009566501 +- 0.00255663)%|

After this fix:

<     LAZY_AND: Hlt2B2OC_BcToDstD0_DstToD0Pi_D0ToHH_D0ToKsLLHH                                                #=146344  Sum=0           Eff=|( 0.000000 +- 0.00000 )%|
<     LAZY_AND: Hlt2B2OC_BdToD0KK_D0ToKsLLHH                                                                  #=146344  Sum=5           Eff=|(0.003416607 +- 0.00152793)%|
<     LAZY_AND: Hlt2B2OC_BdToD0KPi_D0ToKsLLHH                                                                 #=146344  Sum=5           Eff=|(0.003416607 +- 0.00152793)%|
<     LAZY_AND: Hlt2B2OC_BdToD0PiPi_D0ToKsLLHH                                                                #=146344  Sum=2           Eff=|(0.001366643 +- 0.000966356)%|
<     LAZY_AND: Hlt2B2OC_BuToD0Pi_D0ToKsLLHH                                                                  #=146344  Sum=2           Eff=|(0.001366643 +- 0.000966356)%|
<     LAZY_AND: Hlt2B2OC_LbToD0PKWS_D0ToKsLLHH                                                                #=146344  Sum=0           Eff=|( 0.000000 +- 0.00000 )%|
<     LAZY_AND: Hlt2B2OC_LbToD0PK_D0ToKsLLHH                                                                  #=146344  Sum=1           Eff=|(0.0006833215 +- 0.000683319)%|
<     LAZY_AND: Hlt2B2OC_LbToD0PK_D0ToKsTTHH                                                                  #=146344  Sum=7           Eff=|(0.004783250 +- 0.00180786)%|
<     LAZY_AND: Hlt2B2OC_LbToD0PPi_D0ToKsLLHH                                                                 #=146344  Sum=1           Eff=|(0.0006833215 +- 0.000683319)%|
<     LAZY_AND: Hlt2B2OC_LbToD0PPi_D0ToKsTTHH                                                                 #=146344  Sum=7           Eff=|(0.004783250 +- 0.00180786)%|

Other lines involving Kshh have the same rate as before.