testdataexternalizer: exclude Commons CLI from Import-Package
Merge branch 'maint-1.6.1'

The maintenance commit from maint-1.6.1 also makes sure that
testdataexternalizer imports several packages it needs, such
as some of the core BPELUnit framework packages.

Conflicts:
	net.bpelunit.utils.testdataexternalizer/pom.xml