change name convention for modules

Summary:
Following our internal discussion we want to change previously used name convention.
Now it looks like:
```
#import <FBReactNativeTestSpec/FBReactNativeTestSpec.h>
```

Name is a param of `rn_codegen` and `rn_library`. Also, I found it the easiest to move replacing `::_IMPORT_::` into buck rule

Reviewed By: fkgozali

Differential Revision: D16646616

fbshipit-source-id: 2c33c5b4d1c42b0e6f5a42d9a318bd8bda9745f4

packages/react-native-codegen/src/generators/components/GeneratePropsJavaInterface.js

@@ -158,7 +158,11 @@ function getClassExtendString(component): string {
 }
 
 module.exports = {
-  generate(libraryName: string, schema: SchemaType): FilesOutput {
+  generate(
+    libraryName: string,
+    schema: SchemaType,
+    moduleSpecName: string,
+  ): FilesOutput {
     const files = new Map();
     Object.keys(schema.modules).forEach(moduleName => {
       const components = schema.modules[moduleName].components;