replace sed delimiters to be able to use / in docker image buildscript
replace sed delimiters to be able to use / in docker image buildscript

davidfestal/che,davidfestal/che,codenvy/che,davidfestal/che,davidfestal/che,davidfestal/che,davidfestal/che,davidfestal/che,codenvy/che,davidfestal/che,davidfestal/che,codenvy/che,davidfestal/che,codenvy/che