fixed notification about user accepted an invite

git-svn-id: https://svn.research-infrastructures.eu/d4science/gcube/trunk/portal/invites-common-library@149055 82a268e6-3cf1-43bd-a215-b396298e98cf

src/main/java/org/gcube/portal/invites/InvitesManager.java

@@ -146,7 +146,7 @@ public class InvitesManager {
 		String gatewayURL = PortalContext.getConfiguration().getGatewayURL(request);
 		String gatewayName = PortalContext.getConfiguration().getGatewayName(request);
 
-		String subject = new StringBuffer("invite was sent on ").append(vreName).append(" by ").append(invite.getSenderFullName()).toString();
+		String subject = new StringBuffer("An invite was sent on ").append(vreName).append(" by ").append(invite.getSenderFullName()).toString();
 		EmailTemplateService.send(
 				subject, 
 				new TemplateUserHasInvited(currUser, invite.getInvitedEmail(), vreName, gatewayName, gatewayURL),