Re-build test data using Vault 0.11

In preparations for 1.0 compatibility and some later features the test
data generated with 0.5 becomes more of a problem without intermediate
updates, so it is now rebuilt from scratch.

As part of this change the unseal key is now split in 3 parts with a
threshold of 2 instead of the former 1/1,

src/test/resources/data_dir/sys/token/accessor/_2e04db7708a30f5c9ae933165567f53ae1733ba7

@@ -0,0 +1 @@
+{"Value":"AAAAAQKkCb608if/5XnoIX4mxum4Izo9CeV4A4eNp2OvtZhdm6nT328Kk1cyZgyiFBVdqZCsF2aUB4aBo0tJOO4X7gNschAYtGUVP+EhXXNvfJJVCSre+5f5zm3qTkpi7URFCPB2+WnvG4nLHLCDpr8Agp7ZTGRA8ckXA8WjJbmDEG1uBsKZKg=="}