Removing the escape sequence from the output!

Testcases fail as the output is having escape
sequence in it which is not expected to be there.
Removing this escape sequence fixes almost 2000+ testcases.
Signed-off-by: Anushree Mathur <anushree.mathur@linux.vnet.ibm.com>

aexpect/client.py

@@ -996,7 +996,9 @@ def read_until_last_line_matches(self, patterns, timeout=60.0,
         def _get_last_nonempty_line(cont):
             nonempty_lines = [_ for _ in cont.splitlines() if _.strip()]
             if nonempty_lines:
-                return nonempty_lines[-1]
+                # Removing escape sequence from the last element of nonempty_lines
+                nonempty_last_no_escape = astring.strip_console_codes(nonempty_lines[-1])
+                return nonempty_last_no_escape
             return ""
 
         return self.read_until_output_matches(patterns,