Store admin identity on file system (resolves #13) (#74)

Signed-off-by: Simon Stone <sstone1@uk.ibm.com>

internal/app/microfabd/microfabd.go

@@ -30,6 +30,7 @@ import (
 	"github.com/IBM-Blockchain/microfab/internal/pkg/organization"
 	"github.com/IBM-Blockchain/microfab/internal/pkg/peer"
 	"github.com/IBM-Blockchain/microfab/internal/pkg/proxy"
+	"github.com/IBM-Blockchain/microfab/internal/pkg/util"
 	"github.com/IBM-Blockchain/microfab/pkg/client"
 	"github.com/hyperledger/fabric-protos-go/common"
 	"golang.org/x/net/context"
@@ -398,6 +399,13 @@ func (m *Microfab) createOrderingOrganization(config Organization) error {
 	if err != nil {
 		return err
 	}
+	organizationName := organization.Name()
+	lowerOrganizationName := strings.ToLower(organizationName)
+	adminDirectory := path.Join(m.config.Directory, fmt.Sprintf("admin-%s", lowerOrganizationName))
+	err = util.CreateMSPDirectory(adminDirectory, organization.Admin())
+	if err != nil {
+		return err
+	}
 	m.Lock()
 	m.ordererOrganization = organization
 	m.Unlock()
@@ -422,6 +430,13 @@ func (m *Microfab) createEndorsingOrganization(config Organization) error {
 	if err != nil {
 		return err
 	}
+	organizationName := organization.Name()
+	lowerOrganizationName := strings.ToLower(organizationName)
+	adminDirectory := path.Join(m.config.Directory, fmt.Sprintf("admin-%s", lowerOrganizationName))
+	err = util.CreateMSPDirectory(adminDirectory, organization.Admin())
+	if err != nil {
+		return err
+	}
 	m.Lock()
 	m.endorsingOrganizations = append(m.endorsingOrganizations, organization)
 	m.Unlock()