Update file headers in LTTng Control feature

Update file headers in LTTng Control feature

Previously delivered features for LTTng Tools 2.1 support lack
the update of the file headers. This commit corrects that.

Change-Id: I4fb7d4731ab13ee4d905a0a3e94cd589cab95efe
Signed-off-by: Bernd Hufmann <bhufmann@gmail.com>
Reviewed-on: https://git.eclipse.org/r/10617
Tested-by: Hudson CI
Reviewed-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
IP-Clean: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Tested-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
IP-Clean: Matthew Khouzam <matthew.khouzam@ericsson.com>
Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>