Fix swift-ganglia-report-global-stats for 3.5

The Ganglia 3.5 apparently broke this; a simple shot-in-the-dark space
to underscore change seemed to have fixed this.

Change-Id: I4305ccf75f44b181975713311feabd1d297291a2
Merge "Fix swift-ganglia-report-global-stats for 3.5" into production