MXRoomTests: Added a test on [MXRoom join] to ensure SYIOS-105 fix does not break this  method
MXRoomTests: Added a test on [MXRoom join] to ensure SYIOS-105 fix does not break this  method

matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk