FAB-10236 improve integration-test target

The Makefile's 'integration-test' target unnecessarily
builds all the docker images as a dependency. It also
cleans them all, which compounds issues. The only one
it might possibly need is ccenv because the tests
may spin up chaincode.

Also, go test ./... does not correctly handle all tests.
A more correct approach would be to exec go test or ginkgo
from each directory in which there is a suite.

Need to ensure 3rd party images d/l'ed

Change-Id: I8a5c713108c339842471f6415e79924dba7b7964
Signed-off-by: Christopher Ferris <chrisfer@us.ibm.com>

Makefile

@@ -181,8 +181,8 @@ $(BUILD_DIR)/image/testenv/$(DUMMY): $(BUILD_DIR)/image/buildenv/$(DUMMY)
 testenv: $(BUILD_DIR)/image/testenv/$(DUMMY)
 ccenv: $(BUILD_DIR)/image/ccenv/$(DUMMY)
 
-integration-test: docker-clean docker testenv ccenv
- cd integration && go test ./...
+integration-test: ccenv docker-thirdparty
+ find ./integration -name "*suite_test.go" -execdir go test -cover \;
 
 unit-test: unit-test-clean peer-docker testenv ccenv
  cd unit-test && docker-compose up --abort-on-container-exit --force-recreate && docker-compose down