Update authLdap to 1.5.1

Dockerfile

@@ -22,7 +22,7 @@ RUN /bin/echo -e "apache_modules:\n  - mod_rewrite" > /app/code/wp-cli.yml
 
 
 # Get the plugins
-RUN curl -L -o /app/code/authLdap.zip https://github.com/heiglandreas/authLdap/archive/1.4.21.zip
+RUN curl -L -o /app/code/authLdap.zip https://github.com/heiglandreas/authLdap/archive/1.5.1.zip
 RUN curl -L -o /app/code/disable-wordpress-core-update.zip https://downloads.wordpress.org/plugin/disable-wordpress-core-update.zip
 RUN curl -L -o /app/code/wp-mail-smtp.zip https://downloads.wordpress.org/plugin/wp-mail-smtp.0.10.1.zip