fix(dropdown): removed duplicate style class selector
fix(dropdown): removed duplicate style class selector

dlabrecq/patternfly-ng,dlabrecq/patternfly-ng,patternfly/patternfly-ng,patternfly/patternfly-ng,dlabrecq/patternfly-ng,patternfly/patternfly-ng,patternfly/patternfly-ng,dlabrecq/patternfly-ng