allow no-param input when get smapi level

[jichenjc]

testlx:~/zthin-build/RPMS/s390x # smcli
Failed
  Return Code: 100
  Reason Code: 8
  Description: ULGSMC5100E Request not authorized by external security manager
  API issued : Query_API_Functional_Level

ERROR: Unable to determine SMAPI level.

Calls to SMAPI with ESM will require a targetId.

smapiUtilities.c has a function called
getSmapiLevel

There are 6 places in the code that call this routine and they all pass in a null target id.
ex:
rc = getSmapiLevel(vmapiContextP, " ", &smapiLevel);

we can do following as suggested

    fp = popen("sudo /sbin/vmcp q userid", "r");
    if (fp == NULL) {
        printAndLogProcessingErrors(MY_API_NAME, PROCESSING_ERROR, vmapiContextP, "", 0);
        printf("ERROR: Failed to identify the user");
        return 1;
    }
    fgets(queryData, sizeof(queryData)-1, fp);
    pclose(fp);

    myUserid = strtok_r(queryData, " ", &saveptr);

[Huang Rui (bjhuangr)]

fix committed:
https://review.gerrithub.io/c/mfcloud/python-zvm-sdk/+/410928