Adding High Sierra to the platform set. Fixes #5969
Adding High Sierra to the platform set. Fixes #5969

HtmlUnit/selenium,Dude-X/selenium,Ardesco/selenium,twalpole/selenium,twalpole/selenium,HtmlUnit/selenium,valfirst/selenium,joshmgrant/selenium,asashour/selenium,Dude-X/selenium,twalpole/selenium,jsakamoto/selenium,SeleniumHQ/selenium,oddui/selenium,twalpole/selenium,chrisblock/selenium,asashour/selenium,5hawnknight/selenium,joshmgrant/selenium,valfirst/selenium,titusfortner/selenium,SeleniumHQ/selenium,titusfortner/selenium,jsakamoto/selenium,jsakamoto/selenium,krmahadevan/selenium,jsakamoto/selenium,davehunt/selenium,lmtierney/selenium,5hawnknight/selenium,Dude-X/selenium,twalpole/selenium,titusfortner/selenium,joshbruning/selenium,joshmgrant/selenium,joshbruning/selenium,Dude-X/selenium,titusfortner/selenium,5hawnknight/selenium,davehunt/selenium,chrisblock/selenium,SeleniumHQ/selenium,davehunt/selenium,SeleniumHQ/selenium,Dude-X/selenium,twalpole/selenium,SeleniumHQ/selenium,titusfortner/selenium,oddui/selenium,joshbruning/selenium,HtmlUnit/selenium,5hawnknight/selenium,oddui/selenium,krmahadevan/selenium,valfirst/selenium,valfirst/selenium,joshbruning/selenium,asashour/selenium,joshmgrant/selenium,SeleniumHQ/selenium,SeleniumHQ/selenium,joshmgrant/selenium,davehunt/selenium,lmtierney/selenium,5hawnknight/selenium,HtmlUnit/selenium,chrisblock/selenium,chrisblock/selenium,5hawnknight/selenium,oddui/selenium,lmtierney/selenium,twalpole/selenium,Ardesco/selenium,valfirst/selenium,joshbruning/selenium,jsakamoto/selenium,lmtierney/selenium,davehunt/selenium,jsakamoto/selenium,joshmgrant/selenium,valfirst/selenium,titusfortner/selenium,asashour/selenium,Ardesco/selenium,asolntsev/selenium,SeleniumHQ/selenium,krmahadevan/selenium,Ardesco/selenium,krmahadevan/selenium,SeleniumHQ/selenium,oddui/selenium,asolntsev/selenium,HtmlUnit/selenium,Dude-X/selenium,asolntsev/selenium,valfirst/selenium,HtmlUnit/selenium,HtmlUnit/selenium,oddui/selenium,lmtierney/selenium,HtmlUnit/selenium,oddui/selenium,krmahadevan/selenium,chrisblock/selenium,lmtierney/selenium,asashour/selenium,titusfortner/selenium,5hawnknight/selenium,Dude-X/selenium,joshmgrant/selenium,titusfortner/selenium,asolntsev/selenium,Ardesco/selenium,asolntsev/selenium,jsakamoto/selenium,joshbruning/selenium,joshbruning/selenium,titusfortner/selenium,twalpole/selenium,chrisblock/selenium,valfirst/selenium,asolntsev/selenium,valfirst/selenium,krmahadevan/selenium,SeleniumHQ/selenium,asolntsev/selenium,davehunt/selenium,chrisblock/selenium,lmtierney/selenium,joshmgrant/selenium,krmahadevan/selenium,asashour/selenium,davehunt/selenium,valfirst/selenium,Ardesco/selenium,joshmgrant/selenium,joshmgrant/selenium,jsakamoto/selenium,asolntsev/selenium,oddui/selenium,jsakamoto/selenium,lmtierney/selenium,lmtierney/selenium,HtmlUnit/selenium,titusfortner/selenium,Ardesco/selenium,Ardesco/selenium,davehunt/selenium,asashour/selenium,oddui/selenium,asashour/selenium,titusfortner/selenium,twalpole/selenium,davehunt/selenium,joshbruning/selenium,valfirst/selenium,asashour/selenium,chrisblock/selenium,Dude-X/selenium,5hawnknight/selenium,Ardesco/selenium,HtmlUnit/selenium,asolntsev/selenium,SeleniumHQ/selenium,joshbruning/selenium,Dude-X/selenium,krmahadevan/selenium,krmahadevan/selenium,chrisblock/selenium,joshmgrant/selenium,5hawnknight/selenium