[FAB-2862] Update BDD for new config changes

Incorporated latest config changes for config update.

Changed signature collection to use cert aliases for
developers, vs signatures from organizations (CAs).

Defined new peer admins, and place their certs into
the admincerts folder under the local MSP.  These
users are then used for issuing the join channel
commands.

Fixed linter issue in common/mocks/config/orderer.go.

Changed to using admin users for install proposals.

Change-Id: I4778a226acc81ddf249c25e26c3dfbe0aac98e8e
Signed-off-by: Jeff Garratt <garratt.jeff@gmail.com>
Signed-off-by: Kostas Christidis <kostas@christidis.io>

bddtests/docker-compose-next-4.yml

@@ -7,6 +7,7 @@ services:
       file: docker-compose-orderer-solo.yml
       service: orderer0
     environment:
+      - ORDERER_GENERAL_LOCALMSPDIR=${ORDERER0_ORDERER_GENERAL_LOCALMSPDIR}
       - ORDERER_GENERAL_LOCALMSPID=${ORDERER0_ORDERER_GENERAL_LOCALMSPID}
       - ORDERER_GENERAL_TLS_ENABLED=true
       - ORDERER_GENERAL_TLS_PRIVATEKEY=${ORDERER0_ORDERER_GENERAL_TLS_PRIVATEKEY}
@@ -23,6 +24,7 @@ services:
       - CORE_PEER_GOSSIP_BOOTSTRAP=peer1:7051
       - CORE_PEER_PROFILE_ENABLED=true
       - CORE_PEER_COMMITTER_LEDGER_ORDERER=orderer0:7050
+      - CORE_PEER_MSPCONFIGPATH=${PEER0_CORE_PEER_MSPCONFIGPATH}
       - CORE_PEER_LOCALMSPID=${PEER0_CORE_PEER_LOCALMSPID}
       - CORE_PEER_TLS_CERT_FILE=${PEER0_CORE_PEER_TLS_CERT_FILE}
       - CORE_PEER_TLS_KEY_FILE=${PEER0_CORE_PEER_TLS_KEY_FILE}
@@ -42,6 +44,7 @@ services:
       - CORE_PEER_ID=vp1
       - CORE_PEER_GOSSIP_BOOTSTRAP=peer0:7051
       - CORE_PEER_COMMITTER_LEDGER_ORDERER=orderer0:7050
+      - CORE_PEER_MSPCONFIGPATH=${PEER1_CORE_PEER_MSPCONFIGPATH}
       - CORE_PEER_LOCALMSPID=${PEER1_CORE_PEER_LOCALMSPID}
       - CORE_PEER_TLS_CERT_FILE=${PEER1_CORE_PEER_TLS_CERT_FILE}
       - CORE_PEER_TLS_KEY_FILE=${PEER1_CORE_PEER_TLS_KEY_FILE}
@@ -59,6 +62,7 @@ services:
       - CORE_PEER_ID=vp2
       - CORE_PEER_GOSSIP_BOOTSTRAP=peer3:7051
       - CORE_PEER_COMMITTER_LEDGER_ORDERER=orderer0:7050
+      - CORE_PEER_MSPCONFIGPATH=${PEER2_CORE_PEER_MSPCONFIGPATH}
       - CORE_PEER_LOCALMSPID=${PEER2_CORE_PEER_LOCALMSPID}
       - CORE_PEER_TLS_CERT_FILE=${PEER2_CORE_PEER_TLS_CERT_FILE}
       - CORE_PEER_TLS_KEY_FILE=${PEER2_CORE_PEER_TLS_KEY_FILE}
@@ -76,6 +80,7 @@ services:
       - CORE_PEER_ID=vp3
       - CORE_PEER_GOSSIP_BOOTSTRAP=peer2:7051
       - CORE_PEER_COMMITTER_LEDGER_ORDERER=orderer0:7050
+      - CORE_PEER_MSPCONFIGPATH=${PEER3_CORE_PEER_MSPCONFIGPATH}
       - CORE_PEER_LOCALMSPID=${PEER3_CORE_PEER_LOCALMSPID}
       - CORE_PEER_TLS_CERT_FILE=${PEER3_CORE_PEER_TLS_CERT_FILE}
       - CORE_PEER_TLS_KEY_FILE=${PEER3_CORE_PEER_TLS_KEY_FILE}