HPCC-11264 Register GraphControl Per Machine

This is a workaround for the following anomaly (either by installer or RegSvr32):
1.  Install 32bit graph control as Administrator
2.  Install 64bit graph control as Administrator
Control will not work in Chrome (32bit) when user is not Administrator.

Fixes HPCC-11264

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #165 from GordonSmith/HPCC-11264

HPCC-11264 Register GraphControl Per Machine
Merge remote-tracking branch 'origin/candidate-4.2.6' into closedown-4.2.x

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>