Reduce memory usage by deflate buckets test.
Reduce memory usage by deflate buckets test.

* test/test_buckets.c
  (deflate_buckets): Add POOL argument and use it instead of tb->pool.
  (test_deflate_buckets): Use iterpool for deflate_buckets() call.

sworda/serf,idomon/serf,sworda/serf,krime/serf,TommyU/serf,wzugang/serf,TommyU/serf,liuzongquan/serf,liuzongquan/serf,liuzongquan/serf,muthusuba/serf,blueszhangsh/serf,blueszhangsh/serf,Manouchehri/serf,justinweb/serf,wzugang/serf,krime/serf,krime/serf,Manouchehri/serf,idomon/serf,wzugang/serf,TommyU/serf,liuzongquan/serf,idomon/serf,muthusuba/serf,sworda/serf,blueszhangsh/serf,Manouchehri/serf,Manouchehri/serf,justinweb/serf,sworda/serf,krime/serf,idomon/serf,TommyU/serf,blueszhangsh/serf,wzugang/serf,muthusuba/serf,justinweb/serf,muthusuba/serf,justinweb/serf