Jackson Release 2.8.6

Patch version of 2.8, released Jan 12, 2017.

with exception of Scala module, which is to follow at a later point (apologies for delay)

Following fixes are included.

#322: Trim tokens in error messages to 256 byte to prevent attacks
#335: Missing exception for invalid last character of base64 string to decode using Base64Variant.decode()

#349: @JsonAnySetter with @JsonUnwrapped: deserialization fails with arrays
#1388: @JsonIdentityInfo: id has to be the first key in deserialization when deserializing with @JsonCreator
#1425: JsonNode.binaryValue() ignores illegal character if it's the last one
#1453: UntypedObjectDeserializer does not retain float type (over double)
#1456: TypeFactory type resolution broken in 2.7 for generic types when using constructType with context
#1476: Wrong constructor picked up when deserializing object
#1493: ACCEPT_CASE_INSENSITIVE_PROPERTIES fails with @JsonUnwrapped

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