Added PING-PONG mechanisms for detecting death worker address

Signed-off-by: selmeci <selmeci.roman@gmail.com>
Bug fix in metainformation: Sring -> String

Signed-off-by: selmeci <selmeci.roman@gmail.com>
PING PONG 1

Signed-off-by: selmeci <selmeci.roman@gmail.com>
Change port

Signed-off-by: selmeci <selmeci.roman@gmail.com>
Refactoring: duplicated code lines

Signed-off-by: selmeci <selmeci.roman@gmail.com>
Bug fix: recursion for pinging other workers was not in else statement

Signed-off-by: selmeci <selmeci.roman@gmail.com>
Pong wait only 100ms for Ping

Signed-off-by: selmeci <selmeci.roman@gmail.com>