i18nSSLegacyAdapterTest setting wrong arguments for manifest.

Currently if you run i18nSSLegacyAdapterTest twice in a row you
get errors about classes not existing, because the class manifest
doesn't get set correctly during the test setUp() method.
Merge pull request #2598 from halkyon/test_execution_error

i18nSSLegacyAdapterTest setting wrong arguments for manifest.