Add maven plugin to release seata with groupId io.seata

[zhangthen]

#813

[codecov-io]

Codecov Report

Merging #815 into develop will increase coverage by 0.01%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop     #815      +/-   ##
=============================================
+ Coverage      35.57%   35.58%   +0.01%     
+ Complexity       923      922       -1     
=============================================
  Files            217      217              
  Lines           8368     8368              
  Branches        1010     1010              
=============================================
+ Hits            2977     2978       +1     
- Misses          5045     5046       +1     
+ Partials         346      344       -2

Impacted Files	Coverage Δ	Complexity Δ
.../src/main/java/io/seata/core/protocol/Version.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...eata/core/rpc/netty/AbstractRpcRemotingClient.java	16.74% <0%> (-0.48%)	5% <0%> (-2%)
...eata/server/store/FileTransactionStoreManager.java	53.5% <0%> (+1%)	15% <0%> (+1%)	⬆️

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[slievrly]

LGTM

[xingfudeshi]

LGTM