[fix][ml] Managed ledger should recover after open ledger failed

[Demogorgon314]

Motivation

When open managed ledger fails, the entryCacheManager's ml cache will be a closed managed ledger, then if we open this ledger again, it will fail to read because org.apache.bookkeeper.mledger.ManagedLedgerException: LastConfirmedEntry is null when reading ledger xxx exception.

Modifications

• Remove the entryCacheManager's cache if open ml fails.
• Add unit test to cover this case.

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.59%. Comparing base (bbc6224) to head (6bd2c9b).
Report is 607 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #23368      +/-   ##
============================================
+ Coverage     73.57%   74.59%   +1.02%     
- Complexity    32624    34485    +1861     
============================================
  Files          1877     1934      +57     
  Lines        139502   145132    +5630     
  Branches      15299    15870     +571     
============================================
+ Hits         102638   108267    +5629     
+ Misses        28908    28572     -336     
- Partials       7956     8293     +337     

Flag	Coverage Δ
inttests	27.42% <100.00%> (+2.84%)	⬆️
systests	24.55% <0.00%> (+0.22%)	⬆️
unittests	73.94% <100.00%> (+1.10%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...kkeeper/mledger/impl/ManagedLedgerFactoryImpl.java	59.23% <100.00%> (-22.16%)	⬇️

... and 602 files with indirect coverage changes