[KNOWAGE-9198] Set subtype "html"

Author: eng-dedalus

knowage-core/src/main/java/it/eng/spagobi/tools/scheduler/dispatcher/MailDocumentDispatchChannel.java

@@ -157,6 +157,7 @@ public boolean dispatch(BIObject document, byte[] executionOutput) {
 			messageMailDto.setText(mailTxt + "\n" + descriptionSuffix);
 			messageMailDto.setFileExtension(fileExtension);
 			messageMailDto.setContentType("text/html");
+			messageMailDto.setSubtype("html");
 
 			FactoryMailSender.getMailSender(SingletonConfig.getInstance().getConfigValue(IMailSender.MAIL_SENDER)).sendMail(messageMailDto);
 			logger.info("Mail sent for document with label " + document.getLabel());

knowageutils/src/main/java/it/eng/knowage/mailsender/impl/JavaApiMailSender.java

@@ -151,7 +151,7 @@ private void setText(Multipart mp, MessageMailDto messageMailDto) throws Excepti
 			if (messageMailDto.getCharset() != null && !messageMailDto.getCharset().equals("")) {
 				mbp.setText(messageMailDto.getText(), messageMailDto.getCharset(), messageMailDto.getSubtype());
 			} else {
-				mbp.setText(messageMailDto.getText());
+				mbp.setText(messageMailDto.getText(), "UTF-8", messageMailDto.getSubtype());
 			}
 
 			mp.addBodyPart(mbp);