wso2-maven-json-merge-plugin does not allow wildcard

**Description:**
wso2-maven-json-merge-plugin cannot be used with wildcards on files name
Example : 
```
<base>${project.basedir}/json/global.json</base>
<include>
    <param>${project.basedir}/json/override/*.json</param>
</include>
<target>${project.build.directory}/json/global.json</target>
```

**Suggested Labels:**
enhancement

**Affected Product Version:**
`5.2.42`
