message: removed tooltips
diff: <button
  mdl-button
  mdl-button-type="icon"
  - [mdl-tooltip]="'Create'"
  (click)="addRule()"
  disabled="{{ securityGroup.id.startsWith('template') }}"
  >
  <button
  mdl-button
  mdl-button-type="icon"
  - [mdl-tooltip]="'Remove'"
  (click)="removeRule('Ingress', rule.ruleId)"
  disabled="{{ securityGroup.id.startsWith('template') }}"
  >
  <button
  mdl-button
  mdl-button-type="icon"
  - [mdl-tooltip]="'Remove'"
  (click)="removeRule('Egress', rule.ruleId)"
  disabled="{{ securityGroup.id.startsWith('template') }}"
  >
  