part4custom: add E06 (ValueDeserializer direct) and E07 (mix-in on a record), fix run-all.sh exit-code detection through the grep filter (post #50)

docs/output/E06ValueDeserializerDirect.txt

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+serialised : {"assignee":"u-42","title":"Fix build"}
+round-trip : Ticket[assignee=UserId[value=u-42], title=Fix build]
+equal      : true
+no module  : MismatchedInputException - Cannot construct instance of `com.ankurm.jackson3.part4custom.E06ValueDeserializerDirect$UserId` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('u-42')

docs/output/E07MixinOnRecord.txt

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+with mixin   : {"street":"123 Main St","city":"Springfield","zip":"12345"}
+without mixin: {"street":"123 Main St","city":"Springfield","postalCode":"12345","internalTrackingCode":"INTERNAL-X99"}