Requirements: pin and downgrade xmlsec (#12054)

xmlsec is a dependecy from python3-saml which is required by
django-allauth. We have to pin it because the underlying `libxml2-dev`
package installed at system level is incompatible with the Python
version

More info xmlsec/python-xmlsec#324

Author: humitos

requirements/deploy.txt

@@ -476,7 +476,7 @@ wcwidth==0.2.13
     # via
     #   -r requirements/pip.txt
     #   prompt-toolkit
-xmlsec==1.3.15
+xmlsec==1.3.14
     # via
     #   -r requirements/pip.txt
     #   python3-saml

requirements/docker.txt

@@ -513,7 +513,7 @@ wcwidth==0.2.13
     #   prompt-toolkit
 wmctrl==0.5
     # via pdbpp
-xmlsec==1.3.15
+xmlsec==1.3.14
     # via
     #   -r requirements/pip.txt
     #   python3-saml

requirements/pip.in

@@ -147,3 +147,10 @@ django-cacheops
 
 # Used by Addons for sorting patterns
 bumpver
+
+
+# xmlsec is a dependecy from python3-saml which is required by django-allauth.
+# We have to pin it because the underlying `libxml2-dev` package installed at
+# system level is incompatible with the Python version
+# https://github.com/xmlsec/python-xmlsec/issues/324
+xmlsec==1.3.14

requirements/pip.txt

@@ -341,8 +341,10 @@ virtualenv==20.29.3
     # via -r requirements/pip.in
 wcwidth==0.2.13
     # via prompt-toolkit
-xmlsec==1.3.15
-    # via python3-saml
+xmlsec==1.3.14
+    # via
+    #   -r requirements/pip.in
+    #   python3-saml
 
 # The following packages are considered to be unsafe in a requirements file:
 # pip

requirements/testing.txt

@@ -505,7 +505,7 @@ wcwidth==0.2.13
     # via
     #   -r requirements/pip.txt
     #   prompt-toolkit
-xmlsec==1.3.15
+xmlsec==1.3.14
     # via
     #   -r requirements/pip.txt
     #   python3-saml