* created KubernetesCertificate component, moved functionality from configuration.hbs to kubernetes-certificate.hbs, added .scss file, fixed bug in the certificate
* change new component name from KubernetesCertificate to CertificateCard
* switched to using Hds::Card in certificate-card.hbs. Added additional padding class to spacing.scss
* added tests for the CertificateCard in certificate-card-test.js
* added changelog and copyright header
* change naming on CSS class
* changed param name used in CertificateCard to be more generic. removed one class from certificate-card.scss
* changed width of CertificateCard by adding helper class to layout.scss. removed component stylesheet for CertificateCard
