Test not running on German OS

[hendrikebbers]

Looks like a change in the near past (76cc096) breaks tests on a German system:

AllTests > org.bouncycastle.mail.smime.test.SignedMailValidatorTest.testKeyUsage FAILED
    junit.framework.ComparisonFailure: expected:<[The key usage extension of signer certificate does not permit using the key for email signatures].> but was:<[Der Schlüssel des Unterzeichners darf nicht für Email Signaturen verwendet werden].>
        at app//junit.framework.Assert.assertEquals(Assert.java:100)
        at app//junit.framework.Assert.assertEquals(Assert.java:107)
        at app//junit.framework.TestCase.assertEquals(TestCase.java:260)
        at app//org.bouncycastle.mail.smime.test.SignedMailValidatorTest.assertContainsMessage(Unknown Source)
        at app//org.bouncycastle.mail.smime.test.SignedMailValidatorTest.testKeyUsage(Unknown Source)