Reset full to false when pop from bytes queue

[WideLee]

When byte queue is full, it will set queue.full=true but when evict and pop entry from queue, it does not set to false again. It causes bigcache cannot insert new entries once the queue is full.

This commit set queue.full=false when pop entry from queue, and add a test case which failed in current master ccdbc60 and passed in this commit.

Related to issue #214
And it seems the same problem in Pull Request #218

[codecov-commenter]

Codecov Report

Merging #223 into master will decrease coverage by 1.52%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #223      +/-   ##
==========================================
- Coverage   90.61%   89.09%   -1.53%     
==========================================
  Files          15       15              
  Lines         714      715       +1     
==========================================
- Hits          647      637      -10     
- Misses         58       66       +8     
- Partials        9       12       +3     

Impacted Files	Coverage Δ
queue/bytes_queue.go	88.80% <100.00%> (+0.09%)	⬆️
shard.go	86.52% <0.00%> (-4.79%)	⬇️

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[cristaloleg]

sgtm

[siennathesane]

lgtm, thanks for bug hunting!