AMBARI-26622 Fix missing mode in sudo.makedir when Ambari is running as root

[JeffreySmith]

What changes were proposed in this pull request?

This fixes an inconsistent behaviour between the root and non-root branches of makedir in sudo.py.

In the root path, the mode option is silently dropped, while it is respected in the non-root path. Since mode is not passed, it will default to 0o777, which is unexpected behaviour when passing some other mode to the function.

This is the non-root path:

def makedir(path, mode):
    shell.checked_call(["mkdir", path], sudo=True)
    chmod(path, mode)

In this path, mode is honoured and set as expected.

How was this patch tested?

No testing was performed - this just adds the mode parameter to os.mkdir that was previously silently ignored, but still required.