updated readme for 3.3.1-dev branch

README.md

 # NFV API Conformance Test Specification (NFV-TST 010)
 
 This repository hosts the NFV API Conformance test specification for 
-the APIs defined in ETSI NFV GS [SOL002](https://www.etsi.org/deliver/etsi_gs/NFV-SOL/001_099/002/02.07.01_60/gs_NFV-SOL002v020701p.pdf), 
-[SOL003](https://www.etsi.org/deliver/etsi_gs/NFV-SOL/001_099/003/02.07.01_60/gs_NFV-SOL003v020701p.pdf), 
-[SOL005](https://www.etsi.org/deliver/etsi_gs/NFV-SOL/001_099/005/02.07.01_60/gs_NFV-SOL005v020701p.pdf), in their versions 
-v2.7.1.
+the APIs defined in ETSI NFV GS [SOL002](https://www.etsi.org/deliver/etsi_gs/NFV-SOL/001_099/002/03.03.01_60/gs_NFV-SOL002v030301p.pdf), 
+[SOL003](https://www.etsi.org/deliver/etsi_gs/NFV-SOL/001_099/003/03.03.01_60/gs_NFV-SOL003v030301p.pdf), 
+[SOL005](https://www.etsi.org/deliver/etsi_gs/NFV-SOL/001_099/005/03.03.01_60/gs_NFV-SOL005v030301p.pdf), in their versions 
+v3.3.1.
 
-More information and download is available at [DGS/NFV-TST010ed271](https://portal.etsi.org/webapp/WorkProgram/Report_WorkItem.asp?WKI_ID=58931).
+More information and download is available at [DGS/NFV-TST010ed331](https://portal.etsi.org/webapp/WorkProgram/Report_WorkItem.asp?WKI_ID=58931).
 
 **{- Disclaimer: The content of this repository is related to a DRAFT, i.e. a working document, of ETSI ISG NFV.-}**