For PY-17816 we need only a PATH variable from the environment map

Taking more we can override some useful environments set previously, for example locale as it happens here IDEA-171957

python/python-terminal/src/com/jetbrains/python/sdk/PyVirtualEnvTerminalCustomizer.kt

@@ -56,7 +56,10 @@ class PyVirtualEnvTerminalCustomizer : LocalTerminalCustomizer() {
             ((shellName == "fish") && PythonSdkType.isVirtualEnv(sdk))) { //fish shell works only for virtualenv and not for conda
           //for bash we pass activate script to jediterm shell integration (see jediterm-bash.in) to source it there
           findActivateScript(path, shellPath)?.let { activate ->
-            envs.putAll(EnvironmentUtil.getEnvironmentMap())
+            val pathEnv = EnvironmentUtil.getEnvironmentMap().get("PATH")
+            if (pathEnv != null) {
+              envs.put("PATH", pathEnv)
+            }
             envs.put("JEDITERM_SOURCE", if (activate.second != null) "${activate.first} ${activate.second}" else activate.first)
           }
         }