feat: reimplement default role manager

[seriouszyx]

Fix: #261

Signed-off-by: Yixiang Zhao seriouszyx@foxmail.com

[casbin-bot]

@tangyang9464 @imp2002 please review

[hsluoyz]

@tangyang9464

[codecov-commenter]

Codecov Report

Merging #285 (04706d3) into master (51d1294) will increase coverage by 1.31%.
The diff coverage is 93.24%.

@@            Coverage Diff             @@
##           master     #285      +/-   ##
==========================================
+ Coverage   66.75%   68.07%   +1.31%     
==========================================
  Files          45       47       +2     
  Lines        2262     2371     +109     
  Branches      394      405      +11     
==========================================
+ Hits         1510     1614     +104     
- Misses        633      643      +10     
+ Partials      119      114       -5     

Impacted Files	Coverage Δ
...n/java/org/casbin/jcasbin/util/SyncedLRUCache.java	90.00% <90.00%> (ø)
...in/java/org/casbin/jcasbin/rbac/DomainManager.java	91.35% <91.35%> (ø)
...va/org/casbin/jcasbin/rbac/DefaultRoleManager.java	92.23% <93.67%> (+8.71%)	⬆️
src/main/java/org/casbin/jcasbin/rbac/Role.java	94.64% <95.45%> (+4.89%)	⬆️
...ain/java/org/casbin/jcasbin/main/CoreEnforcer.java	79.19% <100.00%> (ø)
...java/org/casbin/jcasbin/util/BuiltInFunctions.java	86.48% <100.00%> (+0.67%)	⬆️
...rc/main/java/org/casbin/jcasbin/util/LRUCache.java	100.00% <100.00%> (ø)
...jcasbin/exception/CasbinNameNotExistException.java	0.00% <0.00%> (-100.00%)	⬇️
src/main/java/org/casbin/jcasbin/util/Util.java	58.24% <0.00%> (-3.30%)	⬇️
... and 2 more

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[hsluoyz]

@tangyang9464

[tangyang9464]

lgtm

[github-actions]

🎉 This PR is included in version 1.26.0 🎉

The release is available on:

• GitHub release
• v1.26.0

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