influxdb_user: implement user password change (#35471)

* Added tests on user removing

* Implemented password changing

* Fix after review

* Added zhhuta changes

test/integration/targets/influxdb_user/tasks/tests.yml

@@ -81,3 +81,60 @@
       assert:
         that:
           - same_user.changed == false
+
+- name: Test change user password in check mode
+  block:
+    - name: Change user password
+      influxdb_user: user_name=user user_password=user2 login_username=admin login_password=admin
+      check_mode: true
+      register: change_password
+
+    - name: Check that password changing succeeds with a change
+      assert:
+        that:
+          - change_password.changed == true
+
+- name: Test change user password
+  block:
+    - name: Change user password
+      influxdb_user: user_name=user user_password=user2 login_username=admin login_password=admin
+      register: change_password
+
+    - name: Check that password changing succeeds with a change
+      assert:
+        that:
+          - change_password.changed == true
+
+- name: Test remove user in check mode
+  block:
+    - name: Remove user
+      influxdb_user: user_name=user state=absent login_username=admin login_password=admin
+      check_mode: true
+      register: remove_user
+
+    - name: Check that removing user succeeds with a change
+      assert:
+        that:
+          - remove_user.changed == true
+
+- name: Test remove user
+  block:
+    - name: Remove user
+      influxdb_user: user_name=user state=absent login_username=admin login_password=admin
+      register: remove_user
+
+    - name: Check that removing user succeeds with a change
+      assert:
+        that:
+          - remove_user.changed == true
+
+- name: Test remove user idempotence
+  block:
+    - name: Remove user
+      influxdb_user: user_name=user state=absent login_username=admin login_password=admin
+      register: remove_user
+
+    - name: Check that removing user succeeds without a change
+      assert:
+        that:
+          - remove_user.changed == false