[Application] Fixed behaviour of clearing data for reply callbacks

[Application] Fixed behaviour of clearing data for reply callbacks

[Bug] Issue reported by PLM P200525-06256
When application suspends the reply callback, e.g. because of waiting for
user interaction, the data for callback was released too early. This caused
that everytime when reply callback is delayed, data was already freed and it
caused crash of application.

[Fix] Issue was fixed with saving pointers for releasing during manager destruction.

[Verification] PLM application has no longer any issues.
TCT passrate is 100%.

Change-Id: I575ab5f9ce4ccd0ce0bff0e6e9bdc15cadc09ed5