tests: Removed an unused variable in f_sync_auto_reauth

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
Release libmongo-client 0.1.7

Finalised the date in NEWS, bumped the version in configure.ac, and
updated the library version information in src/Makefile.am.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
Merge branch 'release/libmongo-client-0.1.7'