Fix exception in ExchangeClient
Remove propagate exception
Remove IO catch block in exchangeClient
Merge pull request #394 from kgribov/AgentError

Fix catch block in ExchangeClient
[maven-release-plugin] prepare release parent-1.2.4-m2
[maven-release-plugin] prepare for next development iteration
+ bug fix . Web Ui / TagEntity Persistance
Merge pull request #395 from amikryukov/gdmaster

+ bug fix . Web Ui / TagEntity Persistance
Merge branch 'master' of github.com:griddynamics/jagger into final-displayName
code cleaning + mention about MetricAggregator getName() method in java doc