Remove assumption in test about presence of a git config

The tests listed below run git commit which fails when a git config does not provide user.email.

+ test/test-ghe-backup-repositories-rsync.sh
+ test/test-ghe-restore.sh
+ test/test-ghe-backup.sh

Author: xeago

test/testlib.sh

@@ -29,6 +29,10 @@ PATH="$ROOTDIR/test/bin:$ROOTDIR/bin:$ROOTDIR/libexec:$PATH"
 TMPDIR="$ROOTDIR/test/tmp"
 TRASHDIR="$TMPDIR/$(basename "$0")-$$"
 
+# Set GIT_{AUTHOR,COMMITTER}_{NAME,EMAIL}
+# This removes the assumption that a git config that specifies these is present.
+export GIT_AUTHOR_NAME=make GIT_AUTHOR_EMAIL=make GIT_COMMITTER_NAME=make GIT_COMMITTER_EMAIL=make
+
 # Point commands at the test backup.config file
 GHE_BACKUP_CONFIG="$ROOTDIR/test/backup.config"
 GHE_DATA_DIR="$TRASHDIR/data"