Fix use of ConfigSlurper in app.gradle.
Fix use of ConfigSlurper in app.gradle.

ctran/lazybones,pledbrook/lazybones,danielgrycman/lazybones,aaronzirbes/lazybones,pledbrook/lazybones-kotlin,danielgrycman/lazybones,pledbrook/lazybones,pledbrook/lazybones-kotlin,ctran/lazybones