VOL-1796 make the log level a chart parameter

Change-Id: Ia42e91ebe1028d0a3f1829dd07e5203784dec0e7
diff --git a/voltha/templates/ro-core.yaml b/voltha/templates/ro-core.yaml
index ce4a6bd..7a60699 100644
--- a/voltha/templates/ro-core.yaml
+++ b/voltha/templates/ro-core.yaml
@@ -11,6 +11,23 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+{{- $set_log_level := tpl .Values.rw_core.log_level . | upper }}
+{{- $log_level := 3 }}
+{{- if eq $set_log_level "DEBUG" }}
+{{- $log_level = 0 }}
+{{- else if eq $set_log_level "INFO" }}
+{{- $log_level = 1 }}
+{{- else if eq $set_log_level "WARN" }}
+{{- $log_level = 2 }}
+{{- else if eq $set_log_level "ERROR" }}
+{{- $log_level = 3 }}
+{{- else if eq $set_log_level "PANIC" }}
+{{- $log_level = 4 }}
+{{- else if eq $set_log_level "FATAL" }}
+{{- $log_level = 5 }}
+{{- else }}
+{{- $log_level = 3 }}
+{{- end }}
 
 ---
 apiVersion: apps/v1
@@ -69,7 +86,7 @@
             - "-grpc_port=50057"
             - "-banner=true"
             - "-ro_core_topic=rocore"
-            - "-log_level=0"
+            - "-log_level={{ $log_level }}"
           ports:
             - containerPort: 50057
               name: grpc-port