Ios parser fixes

[claudiolor]

Description

This PR contains a bunch of fixes for the ios*:

• Change MAC parser textfsm template
• Strip the command output out the parserer
• Handle rows with /r in it
• BGP textfsm Parser fixes
• ip int textfsm parser fixes
• Update pfx cntrs only for estd sessions

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)