Branding: apply branding to Grails console header

Apply branding also to Grails console header: substitute hard-coded
AAF colours in grails-app/views/console/index.gsp with their Tuakiri
equivalents as per the changes to web-app/css/aaf_base_application.css
in e97e3a53a81435d84faef52bd61359202f8c018e:

	-@headColor: #495666;
	-@headFontColor: #FFFFFF;
	-@headFontColorHighlight: #DD7727;
	-@navColor: #3D4754;
	+@headColor: #FFFFFF;
	+@headFontColor: #7CAB1D;
	+@headFontColorHighlight: #628615;
	+@navColor: #7CAB1D;