Duplicate package name checker feature

Done:
1) Covered GenerateSources.getPackageCompareMap() with tests
2) Made output warning message(when similar packages found) in "maven-style"
before:
[WARNING] Duplicate packages detected in next artifacts:
    artifacts: "aar_library_1" "application" have similar package: com.example.application
    artifacts: "apklib_library_1" "apklib_library_2" have similar package: com.example.apklib_library_1

after:
[WARNING] Duplicate packages detected in AndroidManifest.xml file for the next artifacts:
[WARNING] aar_library_1, application have similar package: 'com.example.application'
[WARNING] apklib_library_1, apklib_library_2 have similar package: 'com.example.apklib_library_1'