python/ndg.security.test/ndg/security/test/AttAuthority/AttAuthorityClientTest.py: added config parser so that params can be set from a configuration file.
python/ndg.security.test/ndg/security/test/SessionMgr/SessionMgrClientTest.
py and python/ndg.security.test/ndg/security/test/SessionMgr/sessionMgrClientTest.cfg: added config parser + prompt for passwords where not set in config.
python/ndg.security.common/ndg/security/common/AttAuthority/init.py:
AA client code - added documentation and changed getAttCert so that an AttCert?
type can be passed in as well as a string for userAttCert arg.
