move common test env into the CI config

Author: oxpa

.travis.yml

@@ -50,6 +50,7 @@ env:
     - LD_LIBRARY_PATH=$LUAJIT_LIB:$LD_LIBRARY_PATH
     - DRIZZLE_VER=2011.07.21
     - TEST_NGINX_SLEEP=0.006
+    - MALLOC_PERTURB_=9
   jobs:
     - NGINX_VERSION=1.21.4 OPENSSL_VER=1.1.0l OPENSSL_PATCH_VER=1.1.0d
     - NGINX_VERSION=1.21.4 OPENSSL_VER=1.1.1s OPENSSL_PATCH_VER=1.1.1f

t/020-subrequest.t

@@ -13,7 +13,6 @@ repeat_each(2);
 
 plan tests => repeat_each() * (blocks() * 3 + 23);
 
-$ENV{MALLOC_PERTURB_} = 9;
 $ENV{TEST_NGINX_MEMCACHED_PORT} ||= 11211;
 $ENV{TEST_NGINX_HTML_DIR} ||= html_dir();
 

t/111-req-header-ua.t

@@ -10,8 +10,6 @@ repeat_each(2);
 
 plan tests => repeat_each() * (4 * blocks());
 
-$ENV{MALLOC_PERTURB_} = 9;
-
 #no_diff();
 no_long_string();