Add project ID tests

Signed-off-by: Zach Brown <zab@versity.com>

tests/golden/projects

@@ -0,0 +1,22 @@
+== default new files don't have project
+0
+== set new project on files and dirs
+/mnt/test.0/test/projects/file: 1
+/mnt/test.0/test/projects/dir: 1
+== can use interesting IDs
+2147483647
+2147483648
+4294967295
+9223372036854775807
+9223372036854775808
+18446744073709551615
+== created files and dirs inherit project id
+/mnt/test.0/test/projects/dir/file: 1
+/mnt/test.0/test/projects/dir/sub: 1
+== inheritance continues
+1
+== clearing project id stops inheritance
+/mnt/test.0/test/projects/dir/another-file: 0
+/mnt/test.0/test/projects/dir/another-sub: 0
+== o_tmpfile creations inherit dir
+1

tests/sequence

@@ -12,6 +12,7 @@ data-prealloc.sh
 setattr_more.sh
 offline-extent-waiting.sh
 move-blocks.sh
+projects.sh
 large-fragmented-free.sh
 enospc.sh
 srch-safe-merge-pos.sh

tests/tests/projects.sh

@@ -0,0 +1,40 @@
+
+echo "== default new files don't have project"
+touch "$T_D0/file"
+scoutfs project-id -g "$T_D0/file"
+
+echo "== set new project on files and dirs"
+mkdir "$T_D0/dir"
+scoutfs project-id -s 1 "$T_D0/file" "$T_D0/dir"
+scoutfs project-id -g "$T_D0/file" "$T_D0/dir"
+
+echo "== can use interesting IDs"
+touch "$T_D0/ids"
+for id in         0x7FFFFFFF         0x80000000         0xFFFFFFFF \
+          0x7FFFFFFFFFFFFFFF 0x8000000000000000 0xFFFFFFFFFFFFFFFF; do
+	scoutfs project-id -s $id "$T_D0/ids"
+	scoutfs project-id -g "$T_D0/ids"
+done
+
+echo "== created files and dirs inherit project id"
+touch "$T_D0/dir/file"
+mkdir "$T_D0/dir/sub"
+scoutfs project-id -g "$T_D0/dir/file" "$T_D0/dir/sub"
+
+echo "== inheritance continues"
+mkdir "$T_D0/dir/sub/more"
+scoutfs project-id -g "$T_D0/dir/sub/more"
+
+# .. just inherits 0 :) 
+echo "== clearing project id stops inheritance"
+scoutfs project-id -s 0 "$T_D0/dir"
+touch "$T_D0/dir/another-file"
+mkdir "$T_D0/dir/another-sub"
+scoutfs project-id -g "$T_D0/dir/another-file" "$T_D0/dir/another-sub"
+
+echo "== o_tmpfile creations inherit dir"
+scoutfs project-id -s 1 "$T_D0/dir"
+o_tmpfile_linkat "$T_D0/dir" "$T_D0/dir/tmpfile"
+scoutfs project-id -g "$T_D0/dir/tmpfile"
+
+t_pass