strbuf_test: Cleaned up the code a bit.
strbuf_test: Cleaned up the code a bit.

Made golden_data arrays private to the respective function where possible and
removed "sdb_strbuf" from test names.

sysdb/sysdb,tokkee/sysdb,sysdb/sysdb,sysdb/sysdb,tokkee/sysdb,tokkee/sysdb