Adding a getLastError() method as a stderr equivalent of getLastOutput() to commandexecutor.
Adding a getLastError() method as a stderr equivalent of getLastOutput() to commandexecutor.

Adirelle/PHPCI,mindteam/PHPCI,corretgecom/PHPCI,keradus/PHPCI,seshurajup/PHPCI,laszlof/PHPCI,dwolke/phpci,wodka/PHPCI,chtombleson/PHPCI,onedal88/PHPCI,nevernet/PHPCI,jimmycleuren/PHPCI,Adirelle/PHPCI,tankist/PHPCI,juanf/PHPCI,zilionis/PHPCI,nelsonyang0710/PHPCI,Lechus/PHPCI,gdseller/PHPCI,chtombleson/PHPCI,wodka/PHPCI,SamMousa/PHPCI,chtombleson/PHPCI,keradus/PHPCI,ojengwa/PHPCI,rafaelang/PHPCI,cooperaj/PHPCI,SamMousa/PHPCI,zilionis/PHPCI,andreustimm/PHPCI,mehulsbhatt/PHPCI,corretgecom/PHPCI,zilionis/PHPCI,Lechus/PHPCI,gdseller/PHPCI,gdseller/PHPCI,LewisW/PHPCI,ronanchilvers/PHPCI,LewisW/PHPCI,LewisW/PHPCI,steverobbins/PHPCI,Block8/PHPCI,rafaelang/PHPCI,mikk150/PHPCI,nevernet/PHPCI,ronanchilvers/PHPCI,mavimo/PHPCI,cooperaj/PHPCI,andreustimm/PHPCI,nelsonyang0710/PHPCI,laszlof/PHPCI,mseshachalam/PHPCI,Coderockr/PHPCI,ojengwa/PHPCI,leadermt/PHPCI,keradus/PHPCI,mindteam/PHPCI,andreustimm/PHPCI,Topface/PHPCI,Coderockr/PHPCI,nelsonyang0710/PHPCI,corretgecom/PHPCI,cooperaj/PHPCI,juanf/PHPCI,ronanchilvers/PHPCI,nevernet/PHPCI,jimmycleuren/PHPCI,mikk150/PHPCI,juanf/PHPCI,dwolke/phpci,mehulsbhatt/PHPCI,mavimo/PHPCI,onedal88/PHPCI,ronanchilvers/PHPCI,SamMousa/PHPCI,laszlof/PHPCI,Lechus/PHPCI,steverobbins/PHPCI,ojengwa/PHPCI,leadermt/PHPCI,Block8/PHPCI,Block8/PHPCI,tankist/PHPCI,steverobbins/PHPCI,mseshachalam/PHPCI,dwolke/phpci,onedal88/PHPCI,rafaelang/PHPCI,tankist/PHPCI,mehulsbhatt/PHPCI,jimmycleuren/PHPCI,mavimo/PHPCI,Coderockr/PHPCI,Topface/PHPCI,mindteam/PHPCI,seshurajup/PHPCI,Topface/PHPCI,mikk150/PHPCI,mseshachalam/PHPCI,seshurajup/PHPCI,Adirelle/PHPCI,leadermt/PHPCI