tests: namespace cleanup

lib/SimpleSAML/Store.php

tests/Utils/ReduceSpillOverTest.php

tests/Utils/SpTester.php

tests/lib/SimpleSAML/Auth/SimpleTest.php

tests/lib/SimpleSAML/Auth/SourceTest.php

tests/lib/SimpleSAML/Auth/StateTest.php

tests/lib/SimpleSAML/ConfigurationTest.php

tests/lib/SimpleSAML/DatabaseTest.php

tests/lib/SimpleSAML/Locale/TranslateTest.php

tests/lib/SimpleSAML/Metadata/MetaDataStorageSourceTest.php

tests/lib/SimpleSAML/Metadata/SAMLParserTest.php

tests/lib/SimpleSAML/ModuleTest.php

tests/lib/SimpleSAML/Utils/AttributesTest.php

tests/lib/SimpleSAML/Utils/Config/MetadataTest.php

tests/lib/SimpleSAML/Utils/CryptoTest.php

tests/lib/SimpleSAML/Utils/EMailTest.php

tests/lib/SimpleSAML/Utils/HTTPTest.php

tests/lib/SimpleSAML/Utils/SystemTest.php

tests/lib/SimpleSAML/Utils/TimeTest.php

tests/lib/SimpleSAML/Utils/XMLTest.php