[maven-release-plugin] copy for tag mapdb-0.9.4

[maven-release-plugin] copy for tag mapdb-0.9.3

[maven-release-plugin] copy for tag mapdb-0.9.2

[maven-release-plugin] copy for tag mapdb-0.9.1

[maven-release-plugin] copy for tag mapdb-0.9.0

[maven-release-plugin] copy for tag jdbm-4.001-alpha