Added include_relations_also_as_members flag

docs/test_cases/t00017.md

@@ -0,0 +1,79 @@
+# t00017 - Test include relations also as members flag
+## Config
+```yaml
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00017_class:
+    type: class
+    include_relations_also_as_members: false
+    glob:
+      - ../../tests/t00017/t00017.cc
+    using_namespace:
+      - clanguml::t00017
+    include:
+      namespaces:
+        - clanguml::t00017
+
+```
+## Source code
+```cpp
+namespace clanguml {
+namespace t00017 {
+class A {
+};
+
+class B {
+};
+
+class C {
+};
+
+class D {
+};
+
+class E {
+};
+
+class F {
+};
+
+class G {
+};
+
+class H {
+};
+
+class I {
+};
+
+class J {
+};
+
+class K {
+};
+
+class R {
+private:
+    int some_int;
+    int *some_int_pointer;
+    int **some_int_pointer_pointer;
+    int &some_int_reference;
+    A a;
+    B *b;
+    C &c;
+    const D *d;
+    const E &e{};
+    F &&f;
+    G **g;
+    H ***h;
+    I *&i;
+    volatile J *j;
+    mutable K *k;
+};
+}
+}
+
+```
+## Generated UML diagrams
+![t00017_class](./t00017_class.png "Test include relations also as members flag")