#783 incorrect saLogStreamOpen_2 api input validations

[manu]

Scenario 1:

Opening an already created log stream with log file size altered is returning SA_AIS_ERR_INVALID_PARAM instead of SA_AIS_ERR_EXIST

created an application stream by name safLgStr=test_app_stream1 at around Jan::::13::::17:04:55::::586652000 .

Again tried to open the same stream by giving all the stream attributes same as the above except for the logfilesize attributed changed to a different value @ Jan::::13::::17:04:55::::586652000

Here the saLogStreamCreate fucntion returned SA_AIS_ERR_INVALID_PARAM instead of returning SA_AIS_ERR_EXIST

Scenario 2:

Trying to create an already created application stream by calling the saLogStreamOpen_2 function with the same attributes as the previous one except for the logFileCreateAttributes.haProperty attribute is returning SA_AIS_OK instead of SA_AIS_ERR_EXIST

[Canh Truong]

Currently the result is SA_AIS_ERR_EXIST