Fixed regression from commit b4a6b202a05852967f9c90357d7598bee898c577
that broke runtime argument handling in
org.eclipse.ant.internal.launching.remote.InternalAntRunner.processMinusDProperties(List<String>)
and this broke entire ant execution in remote JVM. One can't iterate
over lists with iterator and remove elements from the list directly.

Change-Id: I6505064fd5367623f483e2c5db7314dec82b8316
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>