Improve test framework: tfw_shopt, tfs_shopt_restore
'make all' now makes libserval.so
Refactor Rhizome test script ready for re-use

Move add_bundles() function from 'rhizomerestful' test script into
testdefs_rhizome.sh, rename to rhizome_add_bundles() and add a new
SID argument
UNFINISHED Rhizome Java API: list bundles