Action level lock

[kikimych]

Improved multiple user support. Replaced command level lock on the debug server with action level lock.

[johnny-keker]

I am facing some issues with, as far as I understand, lock releasing and re-acquiring. All details are on the screenshot below.

1. First instance of VS starts test action
2. Second instance of VS starts test2 action (in less then 5 seconds after first one)

master behavior (not correct)

file.txt is overridden by the test2 and we see NOT_OK in first VS instance

Expected behavior

test2 is waiting when test is over, so we see OK in 1st VS instance, but file contents will be NOT_OK after test2 executed

Actual behavior

For some reason, it waits for 10 seconds no matter what and then displays Unable to acquire lock error