fix(pagination): update lastPageNumber when config.totalItems is changed
fix(pagination): update lastPageNumber when config.totalItems is changed

Fixes https://github.com/patternfly/patternfly-ng/issues/219

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