[BACKLOG-27] Display errors for impossible/edit/delete/export.
It's workaround before we will find way to disable/enable items in menupopup
Merge pull request #482 from AlexanderBuloichik/BACKLOG-27e

[BACKLOG-27] Display errors for impossible edit/delete/export.
[BACKLOG-290] JDBC- Unit Test
[CLEANUP] Adding private tags to doc that needs to be ignored
Merge pull request #483 from jeffreythomas/dev

[CLEANUP] Adding private tags to doc that needs to be ignored
Merge pull request #484 from scottyaslan/master

[BACKLOG-290] JDBC- Cherry picking Unit Test
[BACKOG-290] Updated JMeter tests and oemdoc
Merge pull request #485 from bmorrise/dev

[BACKOG-290] Updated JMeter tests and oemdoc
BACKLOG-614 - CLONE - If a user attempts to create a new connection with the same name the overwrite dialog displays, when user selects Yes an error occurs

Fix set id of connection for overwriting correctly (change service method "isConnectionExist" to return id of connection).
If edit connection and use existing name and confirm overwrite than one of connections is deleted and one is updated.