Grape's @GrabConfig systemProperties set too late

This minimalistic example with @GrabConfig(systemProperties='ivy.message.logger.level=3') does not cause logging output to be produced, i.e. Grape.grab(...) does not execute with the additional systemProperties being set.

@GrabConfig(systemProperties='ivy.message.logger.level=3')
@Grab(group='commons-lang', module='commons-lang', version='2.6')
import org.apache.commons.lang.StringUtils
assert StringUtils.name == 'org.apache.commons.lang.StringUtils'

On setting properties explicitly before the grab() in GrabAnnotationTransformation.java as done in the attached version of the class, it works as expected, but of course is not a proper fix  

The properties are only set by the ResolveVisitor after the Ivy dependency resolution completed, which is too late for being effective for Grape grabbing dependencies.

This bug is problematic in our enterprise setup where we try to configure proxy settings through a @GrabConfig(systemProperties='http.proxyHost=10.0.0.100,... annotation.