test(popover): test default configuration value for autoClose
test(popover): test default configuration value for autoClose

Closes #2577
jnizet/ng-bootstrap,jnizet/ng-bootstrap,ng-bootstrap/core,ktriek/ng-bootstrap,maxokorokov/core,ktriek/ng-bootstrap,benouat/ng-bootstrap,ktriek/ng-bootstrap,benouat/ng-bootstrap,ng-bootstrap/ng-bootstrap,jnizet/ng-bootstrap,ng-bootstrap/ng-bootstrap,benouat/ng-bootstrap,fbasso/ng-bootstrap,ng-bootstrap/core,ng-bootstrap/ng-bootstrap,fbasso/ng-bootstrap,maxokorokov/core,fbasso/ng-bootstrap,ng-bootstrap/ng-bootstrap,maxokorokov/core,benouat/ng-bootstrap,fbasso/ng-bootstrap,ng-bootstrap/core,jnizet/ng-bootstrap,maxokorokov/core,ktriek/ng-bootstrap