Error when using some urls with parameters and '&' character at bash, in...

Error when using some urls with parameters and '&' character at bash, in url example (http://domain.com/service/local/artifact/maven/content?r=private&g=com.myapp&a=my-app-catalog&v=5.31.3&p=war), if we do not use accents ', at the time of passing the url as parameter the scripts (eg get_file.sh), the bash interprets '&' character as (end of command, send command to backgroud). I tried to use these accents in the declaration of the manifesto, by calling the class puppi::project::war, however the manifests of puppi write scripts to deploy wrong.