Changes ENV test case to read the default MODSECURTIY env var

CHANGES

@@ -1,6 +1,8 @@
 v3.0.4 - YYYY-MMM-DD (to be released)
 -------------------------------------
 
+ - Changes ENV test case to read the default MODSECURTIY env var
+   [@zimmerle]
  - Regression: Sets MODSECURITY env var during the tests execution
    [@zimmerle]
  - Fix setenv action to strdup key=variable

test/test-cases/regression/variable-ENV.json

@@ -2,7 +2,7 @@
   {
     "enabled":1,
     "version_min":300000,
-    "title":"Testing Variables :: ENV (1/3)",
+    "title":"Testing Variables :: ENV (1/4)",
     "client":{
       "ip":"200.249.12.31",
       "port":123
@@ -46,7 +46,7 @@
   {
     "enabled":1,
     "version_min":300000,
-    "title":"Testing Variables :: ENV (2/3)",
+    "title":"Testing Variables :: ENV (2/4)",
     "client":{
       "ip":"200.249.12.31",
       "port":123
@@ -80,17 +80,62 @@
       ]
     },
     "expected":{
-      "debug_log":"Variable: ENV:TERM"
+      "debug_log":"regression tests\" .Variable: ENV:MODSECURITY."
     },
     "rules":[
       "SecRuleEngine On",
-      "SecRule ENV:TERM \"@contains test\" \"id:1,phase:3,pass,t:trim\""
+      "SecRule ENV:MODSECURITY \"@contains test\" \"id:1,phase:3,pass,t:trim\""
     ]
   },
   {
     "enabled":1,
     "version_min":300000,
-    "title":"Testing Variables :: ENV (3/3)",
+    "title":"Testing Variables :: ENV (3/4)",
+    "client":{
+      "ip":"200.249.12.31",
+      "port":123
+    },
+    "server":{
+      "ip":"200.249.12.31",
+      "port":80
+    },
+    "request":{
+      "headers":{
+        "Host":"localhost",
+        "User-Agent":"curl/7.38.0",
+        "Accept":"*/*",
+        "Content-Length": "27",
+        "Content-Type": "application/x-www-form-urlencoded"
+      },
+      "uri":"/",
+      "method":"POST",
+      "body": [
+        "param1=value1&param2=value2"
+      ]
+    },
+    "response":{
+      "headers":{
+        "Date":"Mon, 13 Jul 2015 20:02:41 GMT",
+        "Last-Modified":"Sun, 26 Oct 2014 22:33:37 GMT",
+        "Content-Type":"text/html"
+      },
+      "body":[
+        "no need."
+      ]
+    },
+    "expected":{
+      "debug_log":"Target value: \"bar\" .Variable: ENV:modfoo."
+    },
+    "rules":[
+      "SecRuleEngine On",
+      "SecRule ARGS \"@contains value\" \"id:1,phase:3,pass,t:trim,setenv:modfoo=bar\"",
+      "SecRule ENV:modfoo \"@contains test\" \"id:2,phase:3,pass,t:trim\""
+    ]
+  },
+  {
+    "enabled":1,
+    "version_min":300000,
+    "title":"Testing Variables :: ENV (4/4)",
     "client":{
       "ip":"200.249.12.31",
       "port":123