Make the mail session name independent from the environment

[dcoraboeuf]

The current mail session is named mail/SendGrid in service-impl.xml. This works well in Cloudbees.

This must be more flexible in order to allow for deployment of different environments (like EC2).

[dcoraboeuf]

Required for #57

[dcoraboeuf]

Use mail/Session and perform the mapping in the cloudbees.xml configuration file?

[dcoraboeuf]

Use SMTP definition for the Tomcat context definition for the mail/Session resource. See how to define the user name and password.

[dcoraboeuf]

Several resources available:

• http://forums.westhost.com/showthread.php?12744-Tomcat-Configuring-an-Email-Resource
• http://blog.valotas.com/2010/05/mail-session-on-tomcat-and-jetty-via.html
• http://stackoverflow.com/questions/6372171/documentation-of-java-mail-api-configuration-for-jndi-in-tomcat

[dcoraboeuf]

See the Wiki for the configuration documentation.

[dcoraboeuf]

Won't fix: just using mail/SendGrid in all environments.