Fix deployment repository urls

Signed-off-by: Daniel Thomas <drt24@cam.ac.uk>
Bump appengine deployment version up to 4

Signed-off-by: Daniel Thomas <drt24@cam.ac.uk>
Fix exception logging in JEDatabase

Signed-off-by: Daniel Thomas <drt24@cam.ac.uk>
Correctly remove JEDatabases from the databaseMap when they have been destroyed

Signed-off-by: Daniel Thomas <drt24@cam.ac.uk>
Drop the REPEAT_FACTOR to speed up tests

Signed-off-by: Daniel Thomas <drt24@cam.ac.uk>
Disable precompilation in appengine so that we can use bouncycastle (which is a signed jar)

Signed-off-by: Daniel Thomas <drt24@cam.ac.uk>
Bump appengine version of nigori-dev up to 5

Signed-off-by: Daniel Thomas <drt24@cam.ac.uk>