tests: add basic e2fsck regression test for fixing the quota inode

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Aditya Kali <adityakali@google.com>

tests/f_quota/debugfs-cmds

@@ -0,0 +1,7 @@
+list_quota user
+list_quota group
+get_quota user 0
+get_quota user 100
+get_quota user 34
+get_quota group 0
+

tests/f_quota/expect.0

@@ -0,0 +1,21 @@
+debugfs: list_quota user
+ user id     blocks    quota    limit      inodes    quota    limit
+       0      13312        0        0           2        0        0
+      34       1024        0        0           1        0        0
+     100       2048       32       50           2       20       30
+debugfs: list_quota group
+group id     blocks    quota    limit      inodes    quota    limit
+       0      16384        0        0           5        0        0
+debugfs: get_quota user 0
+ user id     blocks    quota    limit      inodes    quota    limit
+       0      13312        0        0           2        0        0
+debugfs: get_quota user 100
+ user id     blocks    quota    limit      inodes    quota    limit
+     100       2048       32       50           2       20       30
+debugfs: get_quota user 34
+ user id     blocks    quota    limit      inodes    quota    limit
+      34       1024        0        0           1        0        0
+debugfs: get_quota group 0
+group id     blocks    quota    limit      inodes    quota    limit
+       0      16384        0        0           5        0        0
+debugfs: 

tests/f_quota/expect.1

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+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+[QUOTA WARNING] Usage inconsistent for ID 0:actual (13312, 2) != expected (14336, 3)
+[QUOTA WARNING] Usage inconsistent for ID 100:actual (2048, 2) != expected (1024, 1)
+Update quota info for quota type 0? yes
+
+
+test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
+test_filesys: 14/16 files (14.3% non-contiguous), 36/100 blocks
+Exit status is 1

tests/f_quota/expect.2

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+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+test_filesys: 14/16 files (14.3% non-contiguous), 36/100 blocks
+Exit status is 0

tests/f_quota/name

@@ -0,0 +1 @@
+fix incorrect usage stats in quota

tests/f_quota/script

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+AFTER_CMD='$DEBUGFS -f $test_dir/debugfs-cmds $TMPFILE 2>&1 | sed -f $cmd_dir/filter.sed > $test_name.0.log'
+PASS_ZERO=true
+
+. $cmd_dir/run_e2fsck