* Allow wallet passphrases to be environment variables
* Merge branch 'master' into wallet-env-passphrases
* Namespace environment variables and clear them at the end of the test.
* Merge branch 'master' into wallet-env-passphrases
* Merge branch 'master' into wallet-env-passphrases
* Merge branch 'master' into wallet-env-passphrases
* Merge branch 'master' into wallet-env-passphrases
* Merge branch 'master' into wallet-env-passphrases
* Merge branch 'master' into wallet-env-passphrases
* Merge branch 'master' into wallet-env-passphrases
* Merge branch 'master' into wallet-env-passphrases
* Merge branch 'master' into wallet-env-passphrases