Update kelvin_sw_test setting

Move the environment variable setting into in-project .bazelrc and set
the bazel test to show more information on the failed tests

Change-Id: I829a9b9a75b8d9c71be570d25b54f8693fae21c9

platforms/nexus/kelvin.mk

diff --git a/platforms/nexus/kelvin.mk b/platforms/nexus/kelvin.mk
index 4e24154..9c7036a 100644
--- a/platforms/nexus/kelvin.mk
+++ b/platforms/nexus/kelvin.mk
@@ -32,7 +32,7 @@
 # Test Kelvin SW artifacts with kelvin ISS simulation
 kelvin_sw_test: kelvin_sim | $(KELVIN_SW_TESTLOG_DIR)
 	cd "$(KELVIN_SW_SRC_DIR)"; \
-		bazel test --test_env=ROOTDIR=$(ROOTDIR) //... ; \
+		bazel test --test_output=errors //... ; \
 		cp -rf bazel-testlogs/tests "$(KELVIN_SW_TESTLOG_DIR)"
 
 ## Clean Kelvin SW artifacts

platforms/shodan/kelvin.mk

diff --git a/platforms/shodan/kelvin.mk b/platforms/shodan/kelvin.mk
index 4e24154..9c7036a 100644
--- a/platforms/shodan/kelvin.mk
+++ b/platforms/shodan/kelvin.mk
@@ -32,7 +32,7 @@
 # Test Kelvin SW artifacts with kelvin ISS simulation
 kelvin_sw_test: kelvin_sim | $(KELVIN_SW_TESTLOG_DIR)
 	cd "$(KELVIN_SW_SRC_DIR)"; \
-		bazel test --test_env=ROOTDIR=$(ROOTDIR) //... ; \
+		bazel test --test_output=errors //... ; \
 		cp -rf bazel-testlogs/tests "$(KELVIN_SW_TESTLOG_DIR)"
 
 ## Clean Kelvin SW artifacts