Update behavior of signature retrieve

[masesdevelopers]

Description

Update behavior of signature retrieve:

• better compare of generic string of method to math the signature
• strongest javap output retrieve

Related Issue

closed #542

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[masesdevelopers]

After a first test with head of JNet repository the issue is still there, see masesgroup/netdroid#100