Resume continuation only once after handling model request

[bamboo]

Resume continuation outside the try block to avoid double resuming (first via resume then later with resumeWithException).

Exceptions thrown by the continuation are simply logged.

[eskatos]

This will make this more robust.

FTR this change was triggered by the following stacktrace shown by IntelliJ after a long period of inactivity.

[eskatos]

java.lang.IllegalStateException: Already resumed
    at kotlin.coroutines.experimental.SafeContinuation.resumeWithException(SafeContinuationJvm.kt:63)
    at org.gradle.kotlin.dsl.resolver.RequestQueue$eventLoop$1.invoke(KotlinBuildScriptDependenciesResolver.kt:220)
    at org.gradle.kotlin.dsl.resolver.RequestQueue$eventLoop$1.invoke(KotlinBuildScriptDependenciesResolver.kt:206)
    at org.gradle.kotlin.dsl.concurrent.EventLoop$newConsumerThread$1.invoke(EventLoop.kt:51)
    at org.gradle.kotlin.dsl.concurrent.EventLoop$newConsumerThread$1.invoke(EventLoop.kt:26)
    at kotlin.concurrent.ThreadsKt$thread$thread$1.run(Thread.kt:30)