[ui-build-to-maven] UI build process moved to maven

there shouldn't be a need for the final `&& ${COOPR_NPM} install --production`....


```
COOPR_NODE=`whereis node | awk '{print $2}'`
COOPR_NPM=`whereis npm | awk '{print $2}'`
COOPR_GULP = './node_modules/gulp/bin/gulp.js'

${COOPR_NPM} run prebuild && ${COOPR_NODE} ${COOPR_GULP} clean && ${COOPR_NODE} ${COOPR_GULP} clean distribute
```