Bug#801039: h2database: depends on obsolete libservlet2.5-java library

[Emmanuel Bourg]

Unfortunately h2database/1.4.185-2 still rely indirectly on the Servlet
API 2.5 which is still pulled by osgi-compendium (<= 5.0.0-2).
osgi-compendium/5.0.0-3 now depends on libservlet3.1-api and h2database
fails to build.