B tag configs code clean up + add CSVIVFV2 in RECO

* CSVIVFV2 is in the standard btagging sequence + EventContent + jetTools.py
It was tested successfully with the global tag: POSTLS172_V4.
* The fix for the SV tracks for IVF vertices does not affect the non-IVF CSV as shown in the plot.
* CSVV1 was removed from all configuration files
* There is not yet a pfCSVIVFV2 (based on candidates) because the IVF candidate needs to be defined first (this is probably for 73X)
![performance](https://cloud.githubusercontent.com/assets/5425769/4136540/1633265c-337f-11e4-9bd3-97db0e3b86ad.png)