removed all non valid characters on project name

Author: HugoMario

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/PythonClientCodegen.java

@@ -169,7 +169,8 @@ public void processOpts() {
         }
 
         if (additionalProperties.containsKey(CodegenConstants.PROJECT_NAME)) {
-            setProjectName((String) additionalProperties.get(CodegenConstants.PROJECT_NAME));
+            String projectName = (String) additionalProperties.get(CodegenConstants.PROJECT_NAME);
+            setProjectName(projectName.replaceAll("[^a-zA-Z0-9\\s\\-_]",""));
         }
         else {
             // default: set project based on package name

modules/swagger-codegen/src/test/java/io/swagger/codegen/python/PythonClientCodegenTest.java

@@ -37,4 +37,13 @@ public void testAdditionalPropertiesPutForConfigValues() throws Exception {
         Assert.assertEquals(codegen.isHideGenerationTimestamp(), false);
     }
 
+    @Test
+    public void testProjectNameCharacters() {
+        String projectName = ";import os; -;os.system('ping localhost');x=b;_yy=";
+        Assert.assertEquals(projectName.replaceAll("[^a-zA-Z0-9\\s\\-_]",""), "import os -ossystemping localhostxb_yy");
+        Assert.assertEquals("petstore-api".replaceAll("[^a-zA-Z0-9\\s\\-_]",""), "petstore-api");
+        Assert.assertEquals("petstore_api2".replaceAll("[^a-zA-Z0-9\\s\\-_]",""), "petstore_api2");
+        Assert.assertEquals("petstore api".replaceAll("[^a-zA-Z0-9\\s\\-_]",""), "petstore api");
+    }
+
 }