solve some bugs for the validation api CLAUDIA-3743
xml model
validation bugs
validation api bugs
adding tests
add traceinterceptor tests, remvoe multi part
add licnse
change validation of product metadata
inclusion of the tenantid in the metadata
Merge branch 'develop' of https://github.com/telefonicaid/fiware-sdc into bug/validationapi
update nexus api
Merge pull request #77 from hmunfru/bug/validationapi

Bug/validationapi