Migrate ziplist.c unit tests to new framework

[hallmason17]

Issue #428.

Moved the SERVER_TEST block from ziplist.c into unit tests in test_ziplist.c. I left the benchmark related tasks alone in their own test, as I am not sure what to do with them.

Some of my assertions are a little vague/useless, but I will try to refine them.

[hallmason17]

Looks like I may also need to add a test that does pop() and another for createIntList(), since I did not add that back.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 69.67%. Comparing base (efa8ba5) to head (240c42f). Report is 6 commits behind head on unstable.

Additional details and impacted files

@@             Coverage Diff              @@
##           unstable     #486      +/-   ##
============================================
- Coverage     69.77%   69.67%   -0.11%     
============================================
  Files           109      109              
  Lines         61801    61801              
============================================
- Hits          43120    43057      -63     
- Misses        18681    18744      +63     

Files	Coverage Δ
src/server.c	88.60% <ø> (ø)
src/ziplist.c	15.17% <ø> (ø)

... and 11 files with indirect coverage changes

[hallmason17]

Yikes, I'm not sure how to fix this signing issue. I tried the rebasing instructions, but the result did not look right...

[madolson]

The best way is probably to do a git rebase -i HEAD~14, squash all the commit together, sign just the last one, and force push over what you have.

[madolson]

All the updates LGTM feel free to update them further if you like.