INDY-941: fix agents (#440)
INDY-941: fix agents (#440)

* Agents should not send txns until ledger is caught up.

Signed-off-by: ashcherbakov <ca681afd35c2012ddb620d7eee6a53369d5e67a5@dsr-company.com>

* support changes in plenum

Signed-off-by: ashcherbakov <ca681afd35c2012ddb620d7eee6a53369d5e67a5@dsr-company.com>

* increment plenum version

Signed-off-by: ashcherbakov <ca681afd35c2012ddb620d7eee6a53369d5e67a5@dsr-company.com>

* fix tests

Signed-off-by: ashcherbakov <ca681afd35c2012ddb620d7eee6a53369d5e67a5@dsr-company.com>

* fix agent startup

Signed-off-by: ashcherbakov <ca681afd35c2012ddb620d7eee6a53369d5e67a5@dsr-company.com>

TechWritingWhiz/indy-node,TechWritingWhiz/indy-node,spivachuk/sovrin-node,TechWritingWhiz/indy-node,spivachuk/sovrin-node,spivachuk/sovrin-node,spivachuk/sovrin-node,TechWritingWhiz/indy-node