[VOL-2356]core log_level command line argument should take log level names not int value

Change-Id: Id5915a5eb6e9a6a5a2a350022a8167b3434d2825
diff --git a/voltha/templates/rw-core.yaml b/voltha/templates/rw-core.yaml
index 72bdab3..724447e 100644
--- a/voltha/templates/rw-core.yaml
+++ b/voltha/templates/rw-core.yaml
@@ -11,23 +11,7 @@
 # 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 }}
+{{- $log_level := tpl .Values.rw_core.log_level . | upper }}
 ---
 apiVersion: v1
 kind: Service