#68: Add keychain initialisation requirements
 #68: Add exception throwing when manipulation non initialised keychain
 #68: Create agile keychain if it doesn't exist
 #68: Raise exception if initialising an already initialised keychain
 #68: Make folder cleaning OS agnostic and part of teardown
  #68: Make folder cleaning OS agnostic and checked after each step
#68 Improve scenario description
#68 Improve scenario steps and add negative scenario for intialisation state check
Merge pull request #69 from OpenPassword/feature/98-Initialise-keychain

Feature/68 initialise keychain