Fixup for da8e24f: TESTING: move tests from uk.ac.diamond.scisoft.analysis.xmlrpc to a test fragment

*.java: The src directory was renamed from test, update
runPythonFileBackground calls to match
MANIFEST.MF: Eclipse misses out calculating org.apache.commons.logging as
a dependency, so make it explicit so tests can be run as JUnit within
Eclipse.

REMINDER: PythonHelper:enablePythonTests() needs to return true for these
tests to run.