Implement codec adapter (fixes #1122)

[dmandalidis]

• Supports using different codecs for keys and values

Unit tests pending until final implementation

[codecov]

Codecov Report

Merging #1123 into master will increase coverage by 0.01%.
The diff coverage is 0%.

@@             Coverage Diff              @@
##             master    #1123      +/-   ##
============================================
+ Coverage     80.33%   80.35%   +0.01%     
- Complexity     5810     5816       +6     
============================================
  Files           416      417       +1     
  Lines         19126    19135       +9     
  Branches       2217     2217              
============================================
+ Hits          15364    15375      +11     
- Misses         2730     2731       +1     
+ Partials       1032     1029       -3

Impacted Files	Coverage Δ	Complexity Δ
.../java/io/lettuce/core/codec/RedisCodecAdapter.java	0% <0%> (ø)	0 <0> (?)
...io/lettuce/core/masterslave/SentinelConnector.java	65% <0%> (-17.5%)	6% <0%> (-2%)
.../io/lettuce/core/protocol/ReconnectionHandler.java	72.89% <0%> (-2.81%)	26% <0%> (ø)
...uce/core/masterslave/SentinelTopologyProvider.java	80.55% <0%> (-2.78%)	9% <0%> (-1%)
src/main/java/io/lettuce/core/Operators.java	34.54% <0%> (-1.82%)	10% <0%> (-1%)
...tuce/core/masterslave/SentinelTopologyRefresh.java	84.86% <0%> (-1.32%)	35% <0%> (ø)
...main/java/io/lettuce/core/AbstractRedisClient.java	76.81% <0%> (-0.49%)	47% <0%> (-1%)
.../io/lettuce/core/dynamic/ReactiveTypeAdapters.java	85.13% <0%> (ø)	1% <0%> (ø)	⬇️
src/main/java/io/lettuce/core/RedisPublisher.java	77.87% <0%> (+0.29%)	5% <0%> (ø)	⬇️
... and 10 more

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[mp911de]

Thanks a lot. That looks just about right and I'm going to merge that PR later this week.

[mp911de]

That's merged and polished now.