Restoring one example as it is used in many places including Helm charts (#2011)

Some tests were pointing to examples directory which has been moved out. Also kept one node.js examples as it is widely used in Helm charts etc.

examples/nodejs/hello.js

@@ -0,0 +1,7 @@
+
+module.exports = async function(context) {
+    return {
+        status: 200,
+        body: "hello, world!\n"
+    };
+}

test/tests/test_kubectl/spec-yaml/function-go.yaml

@@ -15,7 +15,7 @@ spec:
       sum: aa595bb952047c517d849f8fc9e490fdabc37d83795392074a0b15a59748004f
       type: sha256
     type: url
-    url: https://raw.githubusercontent.com/fission/fission/master/examples/go/hello.gogo # this is intentional
+    url: https://raw.githubusercontent.com/fission/examples/master/go/hello.gogo # this is intentional
 
 ---
 apiVersion: fission.io/v1

test/tests/test_package_checksum.sh

@@ -38,8 +38,8 @@ fi
 
 log "Download test script"
 
-url1="https://raw.githubusercontent.com/fission/fission/master/examples/nodejs/hello.js"
-url2="https://raw.githubusercontent.com/fission/fission/master/examples/nodejs/hello-callback.js"
+url1="https://raw.githubusercontent.com/fission/examples/master/nodejs/hello.js"
+url2="https://raw.githubusercontent.com/fission/examples/master/nodejs/hello-callback.js"
 
 wget ${url1}
 sum=$(shasum -a 256 hello.js|cut -d' ' -f 1)