Fix issues with CLI introduced by up-rev of cmd2 module from 0.6.9
to 0.7.0.

Change-Id: I5c1badb856c43331c68c7979e4b0a006c449ae20
diff --git a/cli/main.py b/cli/main.py
index a57a33d..f5ba38b 100755
--- a/cli/main.py
+++ b/cli/main.py
@@ -82,15 +82,8 @@
 
     # cleanup of superfluous commands from cmd2
     del Cmd.do_cmdenvironment
-    # del Cmd.do_eof
-    del Cmd.do_q
-    del Cmd.do_hi
-    del Cmd.do_l
-    del Cmd.do_li
-    del Cmd.do_r
-    del Cmd.do__load
+    del Cmd.do_load
     del Cmd.do__relative_load
-    Cmd.do_edit = Cmd.do_ed
 
     def __init__(self, voltha_grpc, voltha_sim_rest):
         VolthaCli.voltha_grpc = voltha_grpc
diff --git a/requirements.txt b/requirements.txt
index 4eab93f..054d32e 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 argparse==1.2.1
 arrow>=0.10.0
-cmd2>=0.6.9
+cmd2==0.7.0
 colorama>=0.2.5
 cython==0.24.1
 decorator>=3.4.0