The rolename is now saved to the secret internal data for fetching
later during the user revocation process. No longer deriving the role
name from request path
Added support for default revoke SQL statements that will provide the
same functionality as before. If not revoke SQL statements are provided
the default statements are used.
Cleaned up personal ignores from the .gitignore file
The removal of a user from the db is now handled similar to the
creation. The SQL is read out of a key from the role and then executed
with values substituted for username.
1) Use the new LeaseExtend
2) Use default values controlled by mount tuning/system defaults instead
of a random hard coded value
3) Remove grace periods
