<bugfix>DBVistrail.hash*Annotation() fails when annotation values are ints</bugfix>
<bugfix>DBVistrail.hash*Annotation() fails when annotation values are ints</bugfix>

They should never be ints but this fix handles this case.

db/versions/v1_0_2/domain/vistrail.py:
- DBVistrail.hashAnnotations, .hashActionAnnotations: Convert all annotation values to strings.

VisTrails/VisTrails,hjanime/VisTrails,VisTrails/VisTrails,hjanime/VisTrails,minesense/VisTrails,celiafish/VisTrails,VisTrails/VisTrails,Nikea/VisTrails,minesense/VisTrails,hjanime/VisTrails,hjanime/VisTrails,VisTrails/VisTrails,minesense/VisTrails,Nikea/VisTrails,Nikea/VisTrails,minesense/VisTrails,VisTrails/VisTrails,Nikea/VisTrails,celiafish/VisTrails,celiafish/VisTrails,minesense/VisTrails,celiafish/VisTrails,hjanime/VisTrails