[bazel] Ensure the default java toolchain targets java 8
[bazel] Ensure the default java toolchain targets java 8

asolntsev/selenium,Dude-X/selenium,Dude-X/selenium,Ardesco/selenium,joshbruning/selenium,lmtierney/selenium,valfirst/selenium,HtmlUnit/selenium,Ardesco/selenium,joshbruning/selenium,valfirst/selenium,joshbruning/selenium,chrisblock/selenium,Dude-X/selenium,Ardesco/selenium,asolntsev/selenium,lmtierney/selenium,oddui/selenium,HtmlUnit/selenium,titusfortner/selenium,chrisblock/selenium,asolntsev/selenium,joshbruning/selenium,oddui/selenium,Dude-X/selenium,SeleniumHQ/selenium,valfirst/selenium,valfirst/selenium,Dude-X/selenium,SeleniumHQ/selenium,HtmlUnit/selenium,titusfortner/selenium,joshbruning/selenium,asolntsev/selenium,SeleniumHQ/selenium,lmtierney/selenium,HtmlUnit/selenium,Ardesco/selenium,asolntsev/selenium,SeleniumHQ/selenium,valfirst/selenium,lmtierney/selenium,titusfortner/selenium,valfirst/selenium,SeleniumHQ/selenium,valfirst/selenium,SeleniumHQ/selenium,lmtierney/selenium,chrisblock/selenium,titusfortner/selenium,lmtierney/selenium,joshmgrant/selenium,joshmgrant/selenium,chrisblock/selenium,chrisblock/selenium,titusfortner/selenium,titusfortner/selenium,HtmlUnit/selenium,joshbruning/selenium,Ardesco/selenium,Ardesco/selenium,joshmgrant/selenium,HtmlUnit/selenium,joshmgrant/selenium,titusfortner/selenium,HtmlUnit/selenium,SeleniumHQ/selenium,oddui/selenium,joshmgrant/selenium,joshmgrant/selenium,Ardesco/selenium,lmtierney/selenium,oddui/selenium,joshmgrant/selenium,joshbruning/selenium,lmtierney/selenium,joshmgrant/selenium,HtmlUnit/selenium,chrisblock/selenium,oddui/selenium,oddui/selenium,valfirst/selenium,asolntsev/selenium,Ardesco/selenium,oddui/selenium,valfirst/selenium,titusfortner/selenium,Dude-X/selenium,oddui/selenium,chrisblock/selenium,Dude-X/selenium,oddui/selenium,HtmlUnit/selenium,valfirst/selenium,titusfortner/selenium,chrisblock/selenium,Ardesco/selenium,HtmlUnit/selenium,lmtierney/selenium,asolntsev/selenium,joshbruning/selenium,Dude-X/selenium,asolntsev/selenium,Dude-X/selenium,valfirst/selenium,joshbruning/selenium,SeleniumHQ/selenium,joshmgrant/selenium,SeleniumHQ/selenium,titusfortner/selenium,asolntsev/selenium,SeleniumHQ/selenium,joshmgrant/selenium,titusfortner/selenium,joshmgrant/selenium,SeleniumHQ/selenium,chrisblock/selenium