CKM: Extend encrypted initial values test

CKM: Extend encrypted initial values test

- Make it independent from other tests by adding initial values xml preparation,
  key-manager restart and db cleanup.
- Generate initial values at build time using ckm_initial_values tool.
- Install the tested xml file in test directory and copy it to initial values
  dir during the test instead of installing it there directly.
- Encrypt the test data using openssl and the same key that is passed as initial
  value during compilation instead of hardcoding the encryption results.
- Add build time dependency to util-linux to be able to use hexdump.
- Add build time dependency to key-manager-initial-values to be able to run the
  tool.

Change-Id: I7fe4be6a3493860244ac1cc1c0bb0dace5109a04