update gitignore and remove credentials from JavaSender

.gitignore

@@ -68,6 +68,8 @@ local.properties
 ### Intellij ###
 # Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
 # Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+*.iml
+.idea/
 
 # User-specific stuff:
 .idea/**/workspace.xml

src/main/java/de/ul/swtp/modules/messaging/JavaMailSenderConfig.java

@@ -13,10 +13,10 @@ public class JavaMailSenderConfig {
     @Bean
     public JavaMailSender javaMailSender() {
         JavaMailSenderImpl javaMailSender = new JavaMailSenderImpl();
-        javaMailSender.setHost("regulus.uberspace.de");
-        javaMailSender.setPort(587);
-        javaMailSender.setUsername("mv@felixfoertsch.de");
-        javaMailSender.setPassword("zWiXUjNwWxsNNG2mW2vP5uQUzap85Q");
+        javaMailSender.setHost("");
+        javaMailSender.setPort();
+        javaMailSender.setUsername("");
+        javaMailSender.setPassword("");
 
         Properties props = javaMailSender.getJavaMailProperties();
         props.put("mail.transport.protocol", "smtp");