refactor content index store clear / data format (#1138)
refactor content index store clear / data format (#1138)

* switch to using ISPN Query for clearing content index

This avoids the need to iterate the full keyset of the content index each time a
repository is removed, in order to clear indexed paths for that repository. A
reasonable result-set size is set, and the query is repeatedly executed until
the result-set actual size is 0, indicating that all matching records have been removed.

Also tuning the deployment archive for Indy to fix duplicated jars that were ending up
in weird places, and duplicated ISPN classes from an erroneous CDI embedder POM file.

* change content-index cache value type to allow querying, and remove repos from index test validation

* Fixing tests broken by content index refactor, and upgrade http-testserver to avoid race condition.

fix zabbix test server for new port-finder semantics

yma88/indy,yma88/indy,ruhan1/indy,ligangty/indy,ruhan1/indy,ruhan1/indy,pkocandr/indy,ligangty/indy,Commonjava/indy,Commonjava/indy,ligangty/indy,ruhan1/indy,Commonjava/indy,pkocandr/indy,ligangty/indy,Commonjava/indy,jdcasey/indy,jdcasey/indy,Commonjava/indy,ruhan1/indy,ruhan1/indy,ligangty/indy,jdcasey/indy,pkocandr/indy,pkocandr/indy,yma88/indy,Commonjava/indy,jdcasey/indy,jdcasey/indy,yma88/indy,jdcasey/indy,pkocandr/indy,yma88/indy,pkocandr/indy,ligangty/indy,yma88/indy