Add conflict with tarantool.

 tarantool-lts-client (1.5) and tarantool (1.6)
 have file /usr/bin/tarantool

debian/changelog

+tarantool-lts (1.5.5-18-g2998d20-1) unstable; urgency=medium
+
+  * Add conflict with tarantool, closes: #793867.
+
+ -- Dmitry E. Oboukhov <unera@debian.org>  Sat, 12 Sep 2015 12:13:42 +0300
+
 tarantool-lts (1.5.4.28.gfcf2fef-1) unstable; urgency=medium
 
   * Tarantool 1.6 and tarantool 1.5 aren't compatible, so

debian/control

@@ -115,7 +115,7 @@ Architecture: i386 amd64 kfreebsd-i386 kfreebsd-amd64 hurd-i386
 Priority: optional
 Depends: ${shlibs:Depends}, ${misc:Depends}
 Suggests: tarantool-lts, tarantool-tls-client-dbg
-Conflicts: tarantool-client (<< 1.6)
+Conflicts: tarantool-client (<< 1.6), tarantool
 Replaces: tarantool-client (<< 1.6)
 Description: Tarantool in-memory database - command line client
  Tarantool is an in-memory database and Lua application server.