Set default bootstrap to sofa.

[ujjboy]

Fix #90

[codecov-io]

Codecov Report

Merging #94 into master will decrease coverage by 0.05%.
The diff coverage is 80.43%.

@@             Coverage Diff              @@
##             master      #94      +/-   ##
============================================
- Coverage     63.93%   63.87%   -0.06%     
- Complexity      595      603       +8     
============================================
  Files           263      265       +2     
  Lines         11304    11333      +29     
  Branches       1892     1897       +5     
============================================
+ Hits           7227     7239      +12     
- Misses         3103     3122      +19     
+ Partials        974      972       -2

Impacted Files	Coverage Δ	Complexity Δ
...y/sofa/rpc/bootstrap/DefaultProviderBootstrap.java	60.91% <ø> (ø)	0 <0> (ø)	⬇️
...m/alipay/sofa/rpc/bootstrap/ConsumerBootstrap.java	100% <ø> (ø)	0 <0> (ø)	⬇️
...a/com/alipay/sofa/rpc/codec/SerializerFactory.java	91.66% <ø> (ø)	0 <0> (ø)	⬇️
...y/sofa/rpc/bootstrap/DefaultConsumerBootstrap.java	68.51% <ø> (-0.43%)	0 <0> (ø)
...ava/com/alipay/sofa/rpc/config/ConsumerConfig.java	70.51% <ø> (-0.19%)	0 <0> (ø)
.../com/alipay/sofa/rpc/protocol/ProtocolFactory.java	62.96% <ø> (ø)	0 <0> (ø)	⬇️
...ava/com/alipay/sofa/rpc/config/ProviderConfig.java	51.57% <ø> (-0.51%)	0 <0> (ø)
...sofa/rpc/bootstrap/bolt/BoltConsumerBootstrap.java	100% <100%> (ø)	2 <1> (+1)	⬆️
...sofa/rpc/bootstrap/rest/RestConsumerBootstrap.java	100% <100%> (ø)	2 <1> (+1)	⬆️
...java/com/alipay/sofa/rpc/bootstrap/Bootstraps.java	95.65% <100%> (+9.93%)	0 <0> (ø)	⬇️
... and 13 more

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