Fixing two issues with concurrent invocations in the web environment.
Fixing two issues with concurrent invocations in the web environment.

1) We were accidentally resetting the JCL path without maintaining the invariant that classpath items always end in '/'.
2) We have been forgetting to reset static class state for... quite some time now. Whoops.

There's still another issue that I haven't figured out yet related to concurrent invocations that I'm still debugging.

netopyr/doppio,netopyr/doppio,netopyr/doppio,plasma-umass/doppio,bpowers/doppio,jmptrader/doppio,Wanderfalke/doppio,bpowers/doppio,Wanderfalke/doppio,bpowers/doppio,jmptrader/doppio,plasma-umass/doppio,jmptrader/doppio,Wanderfalke/doppio,plasma-umass/doppio