Python3 support to gobgp tests

This PR removes dependencies on old Fabric version, as it's not
supported by Python3.

The current Fabric versions don't support the colors and indent
used previously, so we found substitute methods from other
libraries and defined these in the library files.

The local function from fabric is now just a wrapper to invoke's
run function. All the files were processed through 2to3 command.

All the tests were executed and we don't see any difference on
the outputs when running Python2 or Python3.

The creation of gobgp container is removed from base.py into
fabfile.py, in order to comply with Fabric2 changes and simplify
dependencies.

1 files changed, 6 insertions, 8 deletions

diff --git a/test/lib/exabgp.py b/test/lib/exabgp.py
index 1326dd86..ad129e87 100644
--- a/test/lib/exabgp.py
+++ b/test/lib/exabgp.py
@@ -13,15 +13,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import absolute_import
-
-from fabric import colors
 
 from lib.base import (
     BGPContainer,
     CmdBuffer,
     try_several_times,
     wait_for_completion,
+    yellow,
 )
 
 
@@ -68,7 +66,7 @@ class ExaBGPContainer(BGPContainer):
         # Manpage of exabgp.conf(5):
         # https://github.com/Exa-Networks/exabgp/blob/master/doc/man/exabgp.conf.5
         cmd = CmdBuffer('\n')
-        for peer, info in self.peers.iteritems():
+        for peer, info in self.peers.items():
             cmd << 'neighbor {0} {{'.format(info['neigh_addr'].split('/')[0])
             cmd << '    router-id {0};'.format(self.router_id)
             cmd << '    local-address {0};'.format(info['local_addr'].split('/')[0])
@@ -94,8 +92,8 @@ class ExaBGPContainer(BGPContainer):
             cmd << '}'
 
         with open('{0}/exabgpd.conf'.format(self.config_dir), 'w') as f:
-            print colors.yellow('[{0}\'s new exabgpd.conf]'.format(self.name))
-            print colors.yellow(str(cmd))
+            print(yellow('[{0}\'s new exabgpd.conf]'.format(self.name)))
+            print(yellow(str(cmd)))
             f.write(str(cmd))
 
     def _is_running(self):
@@ -306,6 +304,6 @@ class RawExaBGPContainer(ExaBGPContainer):
 
     def create_config(self):
         with open('{0}/exabgpd.conf'.format(self.config_dir), 'w') as f:
-            print colors.yellow('[{0}\'s new exabgpd.conf]'.format(self.name))
-            print colors.yellow(self.config)
+            print(yellow('[{0}\'s new exabgpd.conf]'.format(self.name)))
+            print(yellow(self.config))
             f.write(self.config)