Release 0.1.27

Release 0.1.27

* Encode blobs with Base64 in ckm tools
* Refactor PKEK2 related functions
* Add a common function for zeroing sensitive data
* Free the context in case of openssl failure
* Add helpers for domain KEK encryption/decryption
* Add helper randomization function in key-provider.cpp
* Make encrypt/decrypt local functions of key-provider.cpp
* Use common function for PKEK1&2 generation
* Make username shorter in KeyProvider tests
* Remove outdated tz_backend test
* Validate encrypted DKEK
* Fix SVACE and C++ issues
* Add gbs option to enable the TZ backend support
* Update log formatter in tests
* Fix internal migration tests
* Fix internal scheme tests
* Remove secret key for software backend
* Some TZ backend fixes.
* Remove unnecessary BSD license
* Add allowed values for -b option of initial values tool
* Add RO location for initial values
* Overwrite existing initial values
* Initial values tool
* Support for encrypted initial-values
* Reduce number of import methods in tz-backend
* Unification of import methods in gstore
* Add parser support of new schema version
* Add backend attribute in xml schema
* Introduce Key class in tz backend
* Add support for TrustZone backend data storage
* Simplify key related functions in tz-backend
* Fix buildbreak caused by improper rebase
* Add log for invalid system service owner id
* Unify alias naming
* Fix TYPO in key-manager_doc.h
* Make spec compliant with gbs --incremental
* Add protection against memory leaking during deserialization
* Add Apache 2.0 license headers

Change-Id: I05a9b6bdf376f6bdc58542fb023528ac122f619f