vnfsdk pkgtools: switch to python3

Switch to python3 for vnfsdk pkgtools' related jenkins job.

Issue-ID: CIMAN-342
Signed-off-by: Lianhao Lu <lianhao.lu@intel.com>
Change-Id: Ic2aa39ea5f28e82870b252a5bdd92c4f1e77c1d7
diff --git a/jjb/vnfsdk/vnfsdk-pkgtools-python.yaml b/jjb/vnfsdk/vnfsdk-pkgtools-python.yaml
index 509f01b..cc516a1 100644
--- a/jjb/vnfsdk/vnfsdk-pkgtools-python.yaml
+++ b/jjb/vnfsdk/vnfsdk-pkgtools-python.yaml
@@ -2,7 +2,7 @@
 - project:
     name: vnfsdk-pkgtools
     project-name: 'vnfsdk-pkgtools'
-    python-version: python2.7
+    python-version: python3
     tox-dir: '.'
     tox-envs: ''
     subproject: