DISABLES segdb queries to avoid importing lalapps

Current releases of lalapps do not apparently include swig-bindings and the line:

from lalapps import inspiralutils

fails. In fact, inspiralutils is only used for segment database queries which, AFAIK, has never been used in production. This MR disables segmentdb queries so we do not have to import that module.

merged

@james-clark I can confirm that I have never used the segment functionality in the reconstructions and residuals analyses. I don't know if all-sky uses it though. @meg.millhouse and @bence.becsy ?