Rework tasks for better administration

[jmoore]

Currently the java omero adduser etc. tasks have bugs (#488). It would be helpful if:

• More was possible with the tasks
• Tasks were runnable via java -jar
• It was possible to pass passwords via stdin to tasks

[jmoore]

r1279 closes.

• Added admin/ChangePasswordTask
• Added DebugTask (prints all properties)

Also, now possible to do:

  cd OMERO_HOME/components/client
  ant quick standalone
  cd target/standalone
  java -jar client-VERSION.jar task=DebugTask < local.properties

The last call to java -jar is enabled by Main-Class being set in the META-INF/MANIFEST file for all jars. This is configurable via etc/local.properties or <component>/build.xml.

Note: to run tasks, the server must also be running.

[jmoore]

r1280 adds more tasks.

[jmoore]

r1282 contains more:

• Added admin.AdminTask abstract super class which handles authentication exceptions more cleanly
• Added TaskFailure which is handled specially by Run
• Fixed the command line tests which were failling because of changes to Configuration; now necessary to use etc/local.properties-like properties for Configuration -- user => omero.user etc.

Reopening because there's obviously more to do.

[jmoore]

r1283 propagates to tools/licenses

[jmoore]

r1285 includes improved error handling. Need more input checks in task.init()

[jmoore]

r1381 fixes the problem of tasks return non-null (error) but the build finishing successfully.

[jmoore]

r1383 adds to usage-ant.txt

[jmoore]

Other administration choices are available. We probably don't want to spend too much time on these functions. Closing.