krb5 commit: Improve Travis test coverage and simplify config

https://github.com/krb5/krb5/commit/b4e7082b8329f482140268a5545d515363688f54
commit b4e7082b8329f482140268a5545d515363688f54
Author: Greg Hudson <[email protected]>
Date:   Wed Jun 19 22:31:57 2019 -0400

    Improve Travis test coverage and simplify config
    
    Specify the xenial (16.04) image, as Travis still sometimes uses 14.04
    by default.  Use cmocka from the package repository instead of
    building it.  Remove python3-paste as paste is no longer a test
    dependency, but add python3-kdcproxy.  Install pyrad via pip3 as the
    Ubuntu-packaged version still has the assertion bug.

 .travis.yml |   14 ++++----------
 1 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 9eb736b..47b249c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,8 @@ language: c++
 
 sudo: required
 
+dist: xenial
+
 matrix:
   include:
   - compiler: clang
@@ -14,15 +16,7 @@ matrix:
 
 before_install:
   - sudo apt-get update -qq
-  - sudo apt-get install -y bison dejagnu gettext keyutils ldap-utils libldap2-dev libkeyutils-dev libssl-dev python3-paste slapd tcl-dev tcsh
-  - mkdir -p cmocka/build
-  - cd cmocka
-  - wget https://cmocka.org/files/1.1/cmocka-1.1.1.tar.xz
-  - tar -xvf cmocka-1.1.1.tar.xz
-  - cd build
-  - cmake ../cmocka-1.1.1 -DCMAKE_INSTALL_PREFIX=/usr
-  - make
-  - sudo make install
-  - cd ../..
+  - sudo apt-get install -y bison dejagnu gettext keyutils ldap-utils libcmocka-dev libldap2-dev libkeyutils-dev libssl-dev python3-kdcproxy python3-pip slapd tcl-dev tcsh
+  - pip3 install pyrad
 
 script: sh -ex .travis-ci.sh