[PATCH] regression in validator command line handling

this simple invocation fails:

java -jar .m2/repository/org/apache/odftoolkit/odfvalidator/1.2.0-incubating-SNAPSHOT/odfvalidator-1.2.0-incubating-SNAPSHOT-jar-with-dependencies.jar foo.odt

Exception in thread "main" java.lang.NullPointerException
at org.odftoolkit.odfvalidator.ODFValidator.getValidatorForSchema(ODFValidator.java:288)
at org.odftoolkit.odfvalidator.ODFValidator.getManifestValidator(ODFValidator.java:186)
at org.odftoolkit.odfvalidator.ODFRootPackageValidator.validateManifest(ODFRootPackageValidator.java:170)
at org.odftoolkit.odfvalidator.ODFRootPackageValidator.validatePre(ODFRootPackageValidator.java:93)
at org.odftoolkit.odfvalidator.ODFPackageValidator._validate(ODFPackageValidator.java:111)
at org.odftoolkit.odfvalidator.ODFPackageValidator.validate(ODFPackageValidator.java:81)
at org.odftoolkit.odfvalidator.ODFValidator.validateFile(ODFValidator.java:163)
at org.odftoolkit.odfvalidator.ODFValidator.validate(ODFValidator.java:125)
at org.odftoolkit.odfvalidator.Main.main(Main.java:294)

because of commit https://svn-master.apache.org/repos/asf/incubator/odf/trunk@1759341
#ODFTOOLKIT-437# ODFValidator: make schema files configurable from cmd line