Travis CI: Use bundle cache
Travis CI: Use bundle cache

karlsvec/ssl_certificate-cookbook,karlsvec/ssl_certificate-cookbook,onddo/ssl_certificate-cookbook,onddo/ssl_certificate-cookbook,zuazo/ssl_certificate-cookbook,onddo/ssl_certificate-cookbook,zuazo/ssl_certificate-cookbook,karlsvec/ssl_certificate-cookbook,zuazo/ssl_certificate-cookbook