Remove $sqlite_db from default database connection

sqlite_db used to be a config option in the DEFAULT section. This
allowed it to be used in config template substitution. Now that it is in
the database section, the template substitution fails with a
NoSuchOptError.

The quick fix is to just hardcode the default connection option to refer
directly to 'cinder.sqlite' instead.

Closes bug: 1339295

Change-Id: Ifd2267aaa8c55d78f88ce6648badefe3f9f664ee
Use PyCrypto to generate randomness passwords

Standard random generator is not secure enouph. Use PyCrypto instead.
Updated requirements.txt with pycrypto>=2.6 according to
global-requirements

Change-Id: I38fd47a30893a946de30fad95c57759781312be6
Closes: bug #1319639
Fixed some typos in the cinder codebase

Change-Id: Ifb8778d20aa1534a7abca3fd6705493327d2893e
Merge "Use PyCrypto to generate randomness passwords"
Merge "Remove $sqlite_db from default database connection"
Merge "Fixed some typos in the cinder codebase"