Search threads taming

[vladak]

No description provided.

[vladak]

As a simple test, deployed debug Tomcat, inserted breakpoint to search.jsp on this line:

 SearchHelper searchHelper = cfg.prepareSearch() .prepareExec(cfg.getRequestedProjects()).executeQuery().prepareSummary(); 

and checked list of threads before and after the line was performed. Before, there were no threads with search- prefix, after there were 2 * sysconfig(_CONFIG_NPROC_ONLN) threads with the prefix. Then performed another search and checked that the thread count remained constant.

[tarzanek]

Lgtm, push.