Added commits for all tickets implementing kea-lfc. Also, corrected the
LRC design url. Commiting on my discretion.

One of the large items was to rearrange the
lfc_controller test code to:
- not use .c_str()
- check the non-existance of the temporary files after processing
- remove any files after each subtest
- Use a_1 instead of A_1 for variable names

There were also some other coding standards issues as well
as additional comments and such.

Update the PIDFile test code to create the file for the
not writable test.

Add entry in ChangeLog

Also, corrected the whitespaces in the preceding entry.

Also fixed whitespaces in some recent entries.