Disabled testserver tests

[tjprescott]

These tests have been written, but commented out with FIXME

• AutoRestPagingTest.test_listWithQueryParams200: Causes flood of calls to the testserver
• AutoRestValidationTest.test_apiVersionValidation: See (Modeler4 does not honor apiVersion in swagger and synthesizes its own autorest#3762)
• AutoRestSwaggerBatArrayTest.test_putFloatValid200: Float not serialized correctly.
• AutoRestSwaggerBatDictionaryTest.test_putFloatValid: Float not serialized correctly.
• AutoRestSwaggerBatDictionaryTest.test_getStringInvalid: Requires workaround behavior where non-string values get turned into string values.
• AutoRestSwaggerBatDictionaryTest.test_putDateTimeRfc1123Valid: Seemingly dead end trying to get 10/12/1492 to serialize as a Wednesday like testserver expects. iOS keeps serializing it as a Friday due to so discrepancies between Julian and Gregorian dates (see: https://stackoverflow.com/questions/10524266/calendric-calculations-in-ios-broken-before-1577-julian-gregorian)
• AutoRestSwaggerBatDictionaryTest.test_getNull: Dictionary response is not nullable.
• AutoRestSwaggerBatDictionaryTest.test_getArrayItemEmpty: Empty item deserializes as an empty Dictionary instead of nil.
• AutoRestSwaggerBatDictionaryTest.test_getDictionaryNull: Dictionary response is not nullable.
• AutoRestParameterizedHostTest.test_get_emptyFailed: Used to pass but now causes a runtime crash.
• AutoRestUrlPathsTest.test_Paths_byteNull_404: Used to pass but now causes a runtime crash.

Issued fixed in PR #318

• AutoRestSwaggerBatDictionaryTest.test_getDictionaryValid: Dictionaries difficult to generically deserialize.
• AutoRestSwaggerBatDictionaryTest.test_putDictionaryValid: Dictionaries difficult to generically serialize.
• AutoRestSwaggerBatDictionaryTest.test_dictionaryItemNull: Dictionaries difficult to generically deserialize.
• AutoRestSwaggerBatDictionaryTest.test_dictionaryItemEmpty: Dictionaries difficult to generically deserialize.
• AutoRestSwaggerBatDictionaryTest.test_complexValid: Dictionary not equatable.
• AutoRestSwaggerBatDictionaryTest.test_complexItemNull: Dictionary not equatable.
• AutoRestSwaggerBatDictionaryTest.test_complexItemEmpty: Dictionary not equatable.