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* Adding async support for AWSSigV4 Signed-off-by: Harsha Vamsi Kalluri <harshavamsi096@gmail.com> * Fix names for connection classes Signed-off-by: Harsha Vamsi Kalluri <harshavamsi096@gmail.com> * Update tests to async name space Signed-off-by: Harsha Vamsi Kalluri <harshavamsi096@gmail.com> * Add import exceptions to python < 3.6 Signed-off-by: Harsha Vamsi Kalluri <harshavamsi096@gmail.com> Signed-off-by: Harsha Vamsi Kalluri <harshavamsi096@gmail.com>