Let versioncmp() compare with a string
Let versioncmp() compare with a string

This fixes spec tests for Puppet 4.3

Phil-Friderici/puppet-module-vas,Ericsson/puppet-module-vas,propyless/puppet-module-vas,Phil-Friderici/puppet-module-vas,Ericsson/puppet-module-vas,velaar/puppet-module-vas,velaar/puppet-module-vas,boandersson/puppet-module-vas,propyless/puppet-module-vas,boandersson/puppet-module-vas