release date update, checksum sync.

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Change Log for Amazon FreeRTOS
 
-## V1.4.8 05/16/2019
+## V1.4.8 05/21/2019
 ### New Featuress
 ### New Boards: Marvell MW320 and MW322
 - Marvell boards MW320 and MW322 are now qualified for Amazon FreeRTOS.

checksums.json

@@ -41,7 +41,6 @@
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     "demos/common/ota/bootloader/utility/README.md": "3693b2bd6b30393c1802cc8ef3b9631c4d47c3168cc66ef24d6d58b6ca02874b", 
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-    "demos/common/ota/bootloader/utility/codesigner_cert_utility/aws_ota_codesigner_certificate.pem": "79705066d68dc58ba6b5c9ad27e8c3f355184be078025ab76d1a1bc9a9cbeade", 
     "demos/common/ota/bootloader/utility/codesigner_cert_utility/codesigner_cert_utility.py": "d768da7e2d6f74c1c8111ec8fd3af0c1624c6604c254fb6f18a37eb03a02bfe4", 
     "demos/common/ota/bootloader/utility/config-validation-rules/MCHP-Curiosity-PIC32MZEF": "2995cedfb8c3a9971edabc5fa1ebb9f3e370e6cacd32cc4628f3cdcb55a0a5fa", 
     "demos/common/ota/bootloader/utility/factory_image_generator.py": "cdeeab34f7effa5c8cf006bfc5557f8c6dd91f1ca151fbfdd57f012de9317440", 
@@ -246,7 +245,7 @@
     "tests/common/greengrass/aws_test_greengrass_discovery.c": "8bef93c38cdf78af18d646200a837763e2026bbd9e78fa9d36eef1ff9d813490", 
     "tests/common/greengrass/aws_test_helper_secure_connect.c": "04916659215ba11c1b878a02a532262a1e4391d8176406ecc9febb873cfae54c", 
     "tests/common/include/aws_application_version.h": "c8934c41d24d7731524118090c369057b72f6a113d5b08232291cb672a28e664", 
-    "tests/common/include/aws_clientcredential.h": "844bb4727bf3a8af8f4e4f160e57d4b3f037da42d001f8bbc4fdc135d727c124", 
+    "tests/common/include/aws_clientcredential.h": "ac76cca6a4d4076488cb64c844d399b58ddd59317ac79380d8c8b0ef5d9fe473", 
     "tests/common/include/aws_clientcredential_keys.h": "0e7188c323d37e0c29280d146dff09affe5eafb76541e5029ae44cae7e2b45f4", 
     "tests/common/include/aws_dev_mode_key_provisioning.h": "09cd7846142d8ba8b136ffedbff94905f21e1d577ab717e9c2628517ac45202b", 
     "tests/common/include/aws_freertos_tcp_test_access_declare.h": "a25643c87fd595b09d07ed872626f96e74beb14750f8c554b8074a7d6d3f7590", 
@@ -264,7 +263,7 @@
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-    "tests/common/include/aws_test_tcp.h": "c23d744a1c602c349f7d109fbbe14c44729e4e1b23e58cb5e2501b349925b469", 
+    "tests/common/include/aws_test_tcp.h": "8041ca9748c4a35742b5c3b836c732c95476752aab84b654dd1fca60cec42862", 
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