[VOL-2357]openolt adapter log_level command line argument should take log level names not int value

Change-Id: I031ebb45eb41993096157ad5ac8addc877048874
diff --git a/voltha-adapter-openolt/templates/adapters-openolt.yaml b/voltha-adapter-openolt/templates/adapters-openolt.yaml
index 672f2b6..a611e07 100644
--- a/voltha-adapter-openolt/templates/adapters-openolt.yaml
+++ b/voltha-adapter-openolt/templates/adapters-openolt.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.
-{{- $log_level := 3 }}
-{{- $set_log_level := tpl .Values.adapter_open_olt.log_level . | upper }}
-{{- 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.adapter_open_olt.log_level . | upper }}
 
 apiVersion: apps/v1
 kind: Deployment