Workaround SSLFile wrong readline prototype and fix bogus tests.
* bzrlib/tests/test_read_bundle.py: (load_tests): Not all tests are parametrized. (TestDeprecations): Deprecate read_bundle_from_url. (TestReadBundleFromURL.test_read_mergeable_from_url): Test read_mergeable_from_url instead of read_bundle_from_url which has no possible_transports parameter and is deprecated. (TestReadBundleFromURL.test_read_mergeable_respects_possible_transports): Fix the test so that it respects the transport class it's supposed to use.
* bzrlib/transport/http/_urllib2_wrappers.py: (_ReportingFileSocket.readline): Workaround bug in httplib for python-2.4 and 2.5.