Uniquify test case descriptions

Make check-test-cases.py pass.

Prior to this commit, there were many repeated test descriptions, but
none with the same test data and dependencies and comments, as checked
with the following command:

    for x in tests/suites/*.data; do perl -00 -ne 'warn "$ARGV: $. = $seen{$_}\n" if $seen{$_}; $seen{$_}=$.' $x; done

Wherever a test suite contains multiple test cases with the exact same
description, add " [#1]", " [#2]", etc. to make the descriptions
unique. We don't currently use this particular arrangement of
punctuation, so all occurrences of " [#" were added by this script.

I used the following ad hoc code:

import sys

def fix_test_suite(data_file_name):
    in_paragraph = False
    total = {}
    index = {}
    lines = None
    with open(data_file_name) as data_file:
        lines = list(data_file.readlines())
        for line in lines:
            if line == '\n':
                in_paragraph = False
                continue
            if line.startswith('#'):
                continue
            if not in_paragraph:
                # This is a test case description line.
                total[line] = total.get(line, 0) + 1
                index[line] = 0
            in_paragraph = True
    with open(data_file_name, 'w') as data_file:
        for line in lines:
            if line in total and total[line] > 1:
                index[line] += 1
                line = '%s [#%d]\n' % (line[:-1], index[line])
            data_file.write(line)

for data_file_name in sys.argv[1:]:
    fix_test_suite(data_file_name)
diff --git a/tests/suites/test_suite_cipher.nist_kw.data b/tests/suites/test_suite_cipher.nist_kw.data
index 9fec976..7825458 100644
--- a/tests/suites/test_suite_cipher.nist_kw.data
+++ b/tests/suites/test_suite_cipher.nist_kw.data
@@ -14,11 +14,11 @@
 depends_on:MBEDTLS_AES_C:MBEDTLS_NIST_KW_C
 auth_crypt_tv:MBEDTLS_CIPHER_AES_192_KW:"000102030405060708090A0B0C0D0E0F1011121314151617":"":"":"96778B25AE6CA435F92B5B97C050AED2468AB8A17AD84E5D":"":"":"00112233445566778899AABBCCDDEEFF":0
 
-KW AES-256 wrap rfc 3394
+KW AES-256 wrap rfc 3394 [#1]
 depends_on:MBEDTLS_AES_C:MBEDTLS_NIST_KW_C
 auth_crypt_tv:MBEDTLS_CIPHER_AES_256_KW:"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F":"":"":"A8F9BC1612C68B3FF6E6F4FBE30E71E4769C8B80A32CB8958CD5D17D6B254DA1":"":"":"00112233445566778899AABBCCDDEEFF0001020304050607":0
 
-KW AES-256 wrap rfc 3394
+KW AES-256 wrap rfc 3394 [#2]
 depends_on:MBEDTLS_AES_C:MBEDTLS_NIST_KW_C
 auth_crypt_tv:MBEDTLS_CIPHER_AES_256_KW:"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F":"":"":"64E8C3F9CE0F5BA263E9777905818A2A93C8191E7D6E8AE7":"":"":"00112233445566778899AABBCCDDEEFF":0
 
@@ -142,11 +142,11 @@
 depends_on:MBEDTLS_AES_C:MBEDTLS_NIST_KW_C
 auth_crypt_tv:MBEDTLS_CIPHER_AES_128_KWP:"00000000000000000000000000000000"::"":"":"EFD0BC7612331A98F2D68F86E606717197BF57E35114234C675D40E9462ACF00DE7860C0F38677F7":"":"":"000102030405060708090A0B0C0D0E0F101112131415161718191A1B":0
 
-KW AES-128 wrap CAVS 17.4 COUNT 0 PLEN 16
+KW AES-128 wrap CAVS 17.4 COUNT 0 PLEN 16 [#1]
 depends_on:MBEDTLS_AES_C:MBEDTLS_NIST_KW_C
 auth_crypt_tv:MBEDTLS_CIPHER_AES_128_KW:"7575da3a93607cc2bfd8cec7aadfd9a6":"":"":"031f6bd7e61e643df68594816f64caa3f56fabea2548f5fb":"":"":"42136d3c384a3eeac95a066fd28fed3f":0
 
-KW AES-128 wrap CAVS 17.4 COUNT 0 PLEN 16
+KW AES-128 wrap CAVS 17.4 COUNT 0 PLEN 16 [#2]
 depends_on:MBEDTLS_AES_C:MBEDTLS_NIST_KW_C
 auth_crypt_tv:MBEDTLS_CIPHER_AES_128_KW:"7575da3a93607cc2bfd8cec7aadfd9a7":"":"":"031f6bd7e61e643df68594816f64cbb3f56fabea2548f5fb":"":"FAIL":"":0