Revert "Fix issue in parameter bindings for operationContextParams: use value instead of path."

This reverts commit fd5cb37.

Author: alextwoods

build_tools/aws-sdk-code-generator/lib/aws-sdk-code-generator/endpoint_parameter.rb

@@ -174,7 +174,7 @@ def operation_context_param_value(operation, param_name)
 
       return nil unless binding
 
-      "JMESPath.search(\"#{Underscore.underscore_jmespath(binding['value'])}\", context.params)"
+      "JMESPath.search(\"#{Underscore.underscore_jmespath(binding['path'])}\", context.params)"
     end
 
     def static_context_param(operation, param_name)

build_tools/aws-sdk-code-generator/spec/fixtures/interfaces/endpoints_string_array/api.json

@@ -41,7 +41,7 @@
       "input": { "shape": "ListOfObjectsOperationRequest" },
       "operationContextParams": {
         "stringArrayParam": {
-          "value": "nested.listOfObjects[*].key"
+          "path": "nested.listOfObjects[*].key"
         }
       },
       "http": {
@@ -53,7 +53,7 @@
       "input": { "shape": "MapOperationRequest" },
       "operationContextParams": {
         "stringArrayParam": {
-          "value": "keys(map)"
+          "path": "keys(map)"
         }
       },
       "http": {