Bugfixes in doSM.py and in create-datacards.py

- added missing factor for H->WW->vvll in doSM.py (only one branch not both were taken into account).
- removed obscure paragraph, which applied unwanted manipulation of signal sample names un create-datacards.py. this caused the bug that when e.g. ggH_hww and ggH where in the list of signal samples, only ggH_hww was taken into account when considering uncertainties in the datacards. The reason for this was that ggH is full contained in ggH_hww and that ggH_hww cam last in the list...