On py2: keep psycopg2 version free

As there is not a unanimous version OK for all plateforms
(although the one really used in prod will be 2.5.4).

source/eitri/requirements.txt

@@ -1,7 +1,7 @@
 future==0.18.3
 docker==3.4.1
 retrying==1.3.3
-psycopg2==2.5.4 ; python_version < "3.9"  # matching the version installed on our debian 8 images
+psycopg2 ; python_version < "3.9"  # keep it free: 2.5.4 is installed on debian 8 images, but doesn't handle PG 13.11 from debian 11
 psycopg2-binary==2.9.7 ; python_version >= "3.9"
 GeoAlchemy2==0.2.4
 SQLAlchemy==1.3.3

source/jormungandr/requirements.txt

@@ -15,7 +15,7 @@ blinker==1.3
 itsdangerous==1.1.0
 protobuf==3.15.0 ; python_version < "3.9"
 protobuf==3.20.3 ; python_version >= "3.9"
-psycopg2==2.5.4 ; python_version < "3.9"  # matching the version installed on our debian 8 images
+psycopg2 ; python_version < "3.9"  # keep it free: 2.5.4 is installed on debian 8 images, but doesn't handle PG 13.11 from debian 11
 psycopg2-binary==2.9.7 ; python_version >= "3.9"
 pyzmq==15.4.0 ; python_version < "3.9"
 pyzmq==25.0.2 ; python_version >= "3.9"

source/sql/requirements.txt

@@ -2,5 +2,5 @@ GeoAlchemy2==0.2.4
 Mako==0.9.1
 SQLAlchemy==1.3.3
 alembic==1.0.11
-psycopg2==2.5.4 ; python_version < "3.9"  # matching the version installed on our debian 8 images
+psycopg2 ; python_version < "3.9"  # keep it free: 2.5.4 is installed on debian 8 images, but doesn't handle PG 13.11 from debian 11
 psycopg2-binary==2.9.7 ; python_version >= "3.9"

source/tyr/requirements.txt

@@ -21,7 +21,7 @@ itsdangerous==1.1.0
 setuptools==44.1.0 ; python_version == "2.7"
 protobuf==3.15.0 ; python_version < "3.9"
 protobuf==3.20.3 ; python_version >= "3.9"
-psycopg2==2.5.4 ; python_version < "3.9"  # matching the version installed on our debian 8 images
+psycopg2 ; python_version < "3.9"  # keep it free: 2.5.4 is installed on debian 8 images, but doesn't handle PG 13.11 from debian 11
 psycopg2-binary==2.9.7 ; python_version >= "3.9"
 pytz==2013.9
 six==1.13.0