Adds missing LDAP "extra" dependencies to ldap provider.

It seems that for quite some time (1.10.4) the "ldap" extra
missed python-ldap dependency.

https://issues.apache.org/jira/browse/AIRFLOW-5261

Also LDAP seems to be popular enough to be added as default
extra in the production image.

Fixes #13306

BREEZE.rst

@@ -1326,7 +1326,7 @@ This is the current syntax for  `./breeze <./breeze>`_:
 
           Production image:
                  async,amazon,celery,cncf.kubernetes,docker,dask,elasticsearch,ftp,grpc,hashicorp,
-                 http,google,microsoft.azure,mysql,postgres,redis,sendgrid,sftp,slack,ssh,statsd,
+                 http,ldap,google,microsoft.azure,mysql,postgres,redis,sendgrid,sftp,slack,ssh,statsd,
                  virtualenv
 
   --image-tag TAG
@@ -1914,7 +1914,7 @@ This is the current syntax for  `./breeze <./breeze>`_:
 
           Production image:
                  async,amazon,celery,cncf.kubernetes,docker,dask,elasticsearch,ftp,grpc,hashicorp,
-                 http,google,microsoft.azure,mysql,postgres,redis,sendgrid,sftp,slack,ssh,statsd,
+                 http,ldap,google,microsoft.azure,mysql,postgres,redis,sendgrid,sftp,slack,ssh,statsd,
                  virtualenv
 
   --image-tag TAG
@@ -2436,7 +2436,7 @@ This is the current syntax for  `./breeze <./breeze>`_:
 
           Production image:
                  async,amazon,celery,cncf.kubernetes,docker,dask,elasticsearch,ftp,grpc,hashicorp,
-                 http,google,microsoft.azure,mysql,postgres,redis,sendgrid,sftp,slack,ssh,statsd,
+                 http,ldap,google,microsoft.azure,mysql,postgres,redis,sendgrid,sftp,slack,ssh,statsd,
                  virtualenv
 
   --image-tag TAG

Dockerfile

@@ -34,7 +34,7 @@
 #                        much smaller.
 #
 ARG AIRFLOW_VERSION="2.0.0.dev0"
-ARG AIRFLOW_EXTRAS="async,amazon,celery,cncf.kubernetes,docker,dask,elasticsearch,ftp,grpc,hashicorp,http,google,microsoft.azure,mysql,postgres,redis,sendgrid,sftp,slack,ssh,statsd,virtualenv"
+ARG AIRFLOW_EXTRAS="async,amazon,celery,cncf.kubernetes,docker,dask,elasticsearch,ftp,grpc,hashicorp,http,ldap,google,microsoft.azure,mysql,postgres,redis,sendgrid,sftp,slack,ssh,statsd,virtualenv"
 ARG ADDITIONAL_AIRFLOW_EXTRAS=""
 ARG ADDITIONAL_PYTHON_DEPS=""
 
@@ -91,6 +91,7 @@ ARG DEV_APT_DEPS="\
      ldap-utils \
      libffi-dev \
      libkrb5-dev \
+     libldap2-dev \
      libpq-dev \
      libsasl2-2 \
      libsasl2-dev \
@@ -347,6 +348,7 @@ ARG RUNTIME_APT_DEPS="\
        krb5-user \
        ldap-utils \
        libffi6 \
+       libldap-2.4-2 \
        libsasl2-2 \
        libsasl2-modules \
        libssl1.1 \

Dockerfile.ci

@@ -86,6 +86,7 @@ RUN mkdir -pv /usr/share/man/man1 \
            graphviz \
            gosu \
            libffi-dev \
+           libldap2-dev \
            libkrb5-dev \
            libpq-dev \
            libsasl2-2 \

scripts/ci/libraries/_initialization.sh

@@ -171,7 +171,7 @@ function initialization::initialize_base_variables() {
         "ssh"
     )
     export INSTALLED_PROVIDERS
-    export INSTALLED_EXTRAS="async,amazon,celery,cncf.kubernetes,docker,dask,elasticsearch,ftp,grpc,hashicorp,http,imap,google,microsoft.azure,mysql,postgres,redis,sendgrid,sftp,slack,ssh,statsd,virtualenv"
+    export INSTALLED_EXTRAS="async,amazon,celery,cncf.kubernetes,docker,dask,elasticsearch,ftp,grpc,hashicorp,http,imap,ldap,google,microsoft.azure,mysql,postgres,redis,sendgrid,sftp,slack,ssh,statsd,virtualenv"
 
     # default version of PIP USED (This has to be < 20.3 until https://github.com/apache/airflow/issues/12838 is solved)
     PIP_VERSION=${PIP_VERSION:="20.2.4"}

setup.py

@@ -316,6 +316,7 @@ def write_version(filename: str = os.path.join(*[my_dir, "airflow", "git_version
 kylin = ['kylinpy>=2.6']
 ldap = [
     'ldap3>=2.5.1',
+    'python-ldap',
 ]
 mongo = [
     'dnspython>=1.13.0,<2.0.0',