Locking issues

[cstamas]

Affected version

master, 1.9.x

Bug description

Seems that multiple remote repositories adds to locking issues, at least we see similar pattern between artifacts and metadata. Related issues:

• Could not acquire write lock for… errors maven-mvnd#836
• "Could not acquire lock(s)" during multi-threaded builds (-T 1C) maven#11116
• [MNG-7868] "Could not acquire lock(s)" error in concurrent maven builds maven#9049

Also in resolver:

• Lock congestion on metadata (ie prefix files) #1641