Fix mail tests for new Greenmail requirements

Author: artembilan

spring-integration-mail/src/test/java/org/springframework/integration/mail/config/SmtpTests.java

@@ -82,7 +82,7 @@ public void testSmtp() throws Exception {
 		assertThat(message.getFrom()).containsOnly(new InternetAddress("foo@bar"));
 		assertThat(message.getRecipients(RecipientType.TO)).containsOnly(new InternetAddress("bar@baz"));
 		assertThat(message.getSubject()).isEqualTo("foo");
-		assertThat(message.getContent()).asString().isEqualTo("foo\r\n");
+		assertThat(message.getContent()).asString().isEqualTo("foo");
 	}
 
 }

spring-integration-mail/src/test/java/org/springframework/integration/mail/dsl/MailTests.java

@@ -131,7 +131,7 @@ public void testSmtp() throws Exception {
 		assertThat(message.getFrom()).containsOnly(new InternetAddress("foo@bar"));
 		assertThat(message.getRecipients(RecipientType.TO)).containsOnly(new InternetAddress("bar@baz"));
 		assertThat(message.getSubject()).isEqualTo("foo");
-		assertThat(message.getContent()).asString().isEqualTo("foo\r\n");
+		assertThat(message.getContent()).asString().isEqualTo("foo");
 
 	}