reverted from MR1153 to make Benetel UL traffic run ok

ci-scripts/conf_files/benetel-5g.conf

@@ -126,7 +126,7 @@ gNBs =
       # pusch-ConfigCommon (up to 16 elements)
         initialULBWPk2_0                      = 2;  # used for UL slot
         initialULBWPmappingType_0             = 1
-        initialULBWPstartSymbolAndLength_0    = 41; # this is SS=0 L=13
+        initialULBWPstartSymbolAndLength_0    = 55; # this is SS=0 L=12
 
         initialULBWPk2_1                      = 2;  # used for mixed slot
         initialULBWPmappingType_1             = 1;