Changed idp version config to 2.4.3

IDP version in config files has been changed to the latest version at
the time.
Removed endorsed libraries symlink task

Removed the task to create an endorsed directory in Tomcat, since as of
Shibboleth IdP v2.4.3, endorsed libraries are no longer necessary.
Create a logs directory writeable by tomcat

A logs directory for shibboleth idp has been created with read and write
permissions for tomcat. This is necessary for proper operation.
Added missing variable assignment to file module

The missing state=directory has been added to the list of arguments to
the file module. This should resolve any errors arising from the
creation of the logs directory.
Changed permissions of shibboleth log folder

Users in the tomcat group now have execute permissions.
Moved tomcat startup to after idp installation

Moving the tomcat startup should resolve errors relating to nonexistent
idp.war file.
Added a new task to change permissions of idp.war

Changing the permissions of the file idp.war will ensure that tomcat has
sufficient privileges to deploy it.
Merge pull request #42 from ausaccessfed/feature/upgrade

Upgraded IdP version to 2.4.3