Story 1734: Added UserRequestReader test and implementation for JSON.

projects/cadcAccessControl-Server/build.xml

...ntrol-Server/src/ca/nrc/cadc/ac/server/PluginFactory.java

...rol-Server/src/ca/nrc/cadc/ac/server/UserPersistence.java

...src/ca/nrc/cadc/ac/server/web/users/CreateUserAction.java

...er/src/ca/nrc/cadc/ac/server/web/users/GetUserAction.java

...rver/src/ca/nrc/cadc/ac/server/web/users/UsersAction.java

...c/ca/nrc/cadc/ac/server/web/users/UsersActionFactory.java

.../cadcAccessControl-Server/test/LdapConfig.test.properties

...rc/ca/nrc/cadc/ac/server/web/users/GetUserActionTest.java

.../src/ca/nrc/cadc/ac/server/web/users/UsersActionTest.java

...cts/cadcAccessControl/src/ca/nrc/cadc/ac/UserRequest.java

...cadcAccessControl/src/ca/nrc/cadc/ac/json/UserReader.java

...essControl/src/ca/nrc/cadc/ac/json/UserRequestReader.java

.../cadcAccessControl/src/ca/nrc/cadc/ac/xml/UserReader.java

...cessControl/src/ca/nrc/cadc/ac/xml/UserRequestReader.java