Correction in StrippingRD/StrippingB2KstTauTau for v28r2p1 Stripping

The MR aims at correcting the cut selection on the PID of the electron for the B2KstTauTau_TauE_Line and B2KstTauTau_TauE_SameSign_Line.

The rates after the modification are shown here:

StrippingReport INFO Event 10000, Good event 10000

Decision name	Rate[%]	Accepted	Mult	ms/evt
StrippingGlobal	0.2800	28		4.341
StrippingSequenceStreamBhadron	0.2800	28		4.310
!StrippingB2KstTauTau_TauTau_Line	0.0200	2	7.000	0.894
!StrippingB2KstTauTau_TauMu_Line	0.0800	8	3.125	0.149
!StrippingB2KstTauTau_TauE_Line	0.1100	11	1.818	0.176
!StrippingB2KstTauTau_MuMu_Line	0.0500	5	1.200	0.294
!StrippingB2KstTauTau_TauTau_SameSign_Line	0.0300	3	28.000	0.205
!StrippingB2KstTauTau_TauMu_SameSign_Line	0.0300	3	5.333	0.129
!StrippingB2KstTauTau_TauE_SameSign_Line	0.0500	5	2.200	0.089
!StrippingB2KstTauTau_MuMu_SameSign_Line	0.0100	1	1.000	0.067
!StrippingB2KstTauTau_DDSL_Line	0.0000	0	0.000	0.355
!StrippingB2KstTauTau_TauTau_Line_TIMING	0.0200	2	7.000	0.092
!StrippingB2KstTauTau_TauMu_Line_TIMING	0.0800	8	3.125	0.126
!StrippingB2KstTauTau_TauE_Line_TIMING	0.1100	11	1.818	0.131
!StrippingB2KstTauTau_MuMu_Line_TIMING	0.0500	5	1.200	0.046
!StrippingB2KstTauTau_TauTau_SameSign_Line_TIMING	0.0300	3	28.000	0.190
!StrippingB2KstTauTau_TauMu_SameSign_Line_TIMING	0.0200	2	2.000	0.035
!StrippingB2KstTauTau_TauE_SameSign_Line_TIMING	0.0400	4	2.000	0.067
!StrippingB2KstTauTau_MuMu_SameSign_Line_TIMING	0.0100	1	1.000	0.037
!StrippingB2KstTauTau_DDSL_Line_TIMING	0.0000	0	0.000	0.048