code: public PagedList<CertificateItem> listCertificateVersions(final String vaultBaseUrl, final String certificateName,
              final Integer maxresults) {
          return getCertificateVersions(vaultBaseUrl, certificateName, maxresults);
      }
docs: List the versions of a certificate.
  
  @param vaultBaseUrl
  The vault name, e.g. https://myvault.vault.azure.net
  @param certificateName
  The name of the certificate
  @param maxresults
  Maximum number of results to return in a page. If not specified
  the service will return up to 25 results.
  @return the PagedList&lt;CertificateItem&gt; if successful.