Change selection strategy to ManualSelectionStrategy

[joecorall]

@ajstanley discovered with the cantaloupe selection strategy set to automatic, the kakadu java library is used to read JPEG2000 files, resulting in errors like

	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:905)
	at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.lang.UnsatisfiedLinkError: no kdu_jni in java.library.path: /usr/lib/jvm/java-17-openjdk/lib/server:/usr/lib/jvm/java-17-openjdk/lib:/usr/lib/jvm/java-17-openjdk/../lib:/usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib
	at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2434)
	at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:818)
	at java.base/java.lang.System.loadLibrary(System.java:1989)
	at kdu_jni.Kdu_message.<clinit>(Kdu_message.java:5)
	at edu.illinois.library.cantaloupe.processor.codec.jpeg2000.JPEG2000KakaduImageReader.<clinit>(JPEG2000KakaduImageReader.java:197)
	at edu.illinois.library.cantaloupe.processor.KakaduNativeProcessor.<init>(KakaduNativeProcessor.java:77)

We don't ship kakadu with cantaloupe due to its restrictive licensing, and instead use the openjpeg processor. Setting the selection strategy to manual uses the openjpeg processor instead of kakadu.

[joecorall]

This can probably also close this old issue Islandora/documentation#922