Set jaeger collector endpoint as an environment variable (#1399)

To follow 12-factor app rules, make jaeger collector endpoint
as an environment variable instead of CLI args. It's easier to
replace the value in different deployments. Also, we can utilize
valueFrom to get value from the configmap.

charts/fission-all/templates/router.yaml

@@ -33,7 +33,7 @@ spec:
         image: {{ include "fission-bundleImage" . | quote }}
         imagePullPolicy: {{ .Values.pullPolicy }}
         command: ["/fission-bundle"]
-        args: ["--routerPort", "8888", "--executorUrl", "http://executor.{{ .Release.Namespace }}", "--collectorEndpoint", "{{ .Values.traceCollectorEndpoint }}"]
+        args: ["--routerPort", "8888", "--executorUrl", "http://executor.{{ .Release.Namespace }}"]
         env:
           - name: POD_NAMESPACE
             valueFrom:
@@ -53,6 +53,8 @@ spec:
             value: {{ .Values.router.svcAddressMaxRetries | default 5 | quote }}
           - name: ROUTER_SVC_ADDRESS_UPDATE_TIMEOUT
             value: {{ .Values.router.svcAddressUpdateTimeout | default "30s" | quote }}
+          - name: TRACE_JAEGER_COLLECTOR_ENDPOINT
+            value: "{{ .Values.traceCollectorEndpoint }}"
           - name: TRACING_SAMPLING_RATE
             value: {{ .Values.router.traceSamplingRate | default "0.5" | quote }}
           - name: USE_ENCODED_PATH