Fix xml test version check.

test/integration/targets/xml/tasks/main.yml

@@ -14,22 +14,18 @@
     state: present
 #  when: ansible_os_family == "Darwin"
 
-- name: Get lxml major version
-  shell: python -c 'from lxml import etree; print(etree.LXML_VERSION[0])'
-  register: lxml_major_version
-
-- name: Get lxml minor version
-  shell: python -c 'from lxml import etree; print(etree.LXML_VERSION[1])'
-  register: lxml_minor_version
+- name: Get lxml version
+  command: python -c 'from lxml import etree; print(".".join(str(v) for v in etree.LXML_VERSION))'
+  register: lxml_version
 
 - name: Set lxml capabilities as variables
   set_fact:
     # NOTE: Some tests require predictable element attribute order,
     #       which is only guaranteed starting from lxml v3.0alpha1
-    lxml_predictable_attribute_order: '{{ lxml_major_version.stdout|int >= 3 }}'
+    lxml_predictable_attribute_order: '{{ lxml_version.stdout is version("3", ">=") }}'
 
     # NOTE: The xml module requires at least lxml v2.3.0
-    lxml_xpath_attribute_result_attrname: '{{ lxml_major_version.stdout|int >= 2 and lxml_minor_version.stdout|int >= 3 }}'
+    lxml_xpath_attribute_result_attrname: '{{ lxml_version.stdout is version("2.3.0", ">=") }}'
 
 - name: Only run the tests when lxml v2.3.0+
   when: lxml_xpath_attribute_result_attrname