Add some multilepton channels with possibility of a displaced dilepton

the new lines are: StrippingMultiLepton_B24muXLongLivedLine, StrippingMultiLepton_B26muXLongLivedLine, StrippingMultiLepton_Incl8mu4bodyLongLivedLine, StrippingMultiLepton_InclDet6mu3bodyLongLivedLine

the others are unchanged compared to 2017-patches but still should be run in the 2018 restirpping (this needs Phys!901 (merged) to be picked up)

test over 75k: (only new lines here)

 |_StrippingSequenceStreamLeptonic_                            |  2.1480|      1611|       |  57.255|
 |!StrippingMultiLepton_B24muXLongLivedLine                    |  0.3280|       246| 14.333|   3.409|
 |!StrippingMultiLepton_B26muXLongLivedLine                    |  0.1480|       111| 69.622|   0.631|
 |!StrippingMultiLepton_B24muXLongLivedLine_TIMING             |  0.3253|       244| 14.451|   0.093|
 |!StrippingMultiLepton_B26muXLongLivedLine_TIMING             |  0.1480|       111| 69.622|   0.167|

 |_StrippingSequenceStreamDimuon_                              |  0.2013|       151|       |  23.185|
 |!StrippingMultiLepton_Incl8mu4bodyLongLivedLine              |  0.0053|         4|  4.000|   0.040|
 |!StrippingMultiLepton_InclDet6mu3bodyLongLivedLine           |  0.0333|        25|  4.600|   0.043|
 |!StrippingMultiLepton_Incl8mu4bodyLongLivedLine_TIMING       |  0.0053|         4|  4.000|   0.033|
 |!StrippingMultiLepton_InclDet6mu3bodyLongLivedLine_TIMING    |  0.0333|        25|  4.600|   0.033|

fyi @tmombach @iwilliam @sferrere