If the eviction server finds no candidates (which can happen after a compact operation clears the queue), make sure application threads see the list as empty, otherwise they can race with the eviction thread by reading the section of the array that is being filled during a walk.
Always initialize WT_PACK_VALUE before use.
Add a default declaration for WT_PACK structures too.
Merge branch 'develop' into wtperf-745
line-wrapped
Don't create the table unless configured for table creation.
"aggro" -> "aggregated"
renamed:    wtperf.py -> wtperf_graph.py
fix a comment's wording.
Rename run_mix_ops to be g_run_mix_ops.
Change "off" to "field_offset".
Change latency_aggregate's default to 1.
Restore ability to populate and subsequently run workloads on an
existing table.