fix Dockerfile ansible test image (#2104)

Author: camilamacedo86

internal/scaffold/ansible/build_test_framework_dockerfile.go

@@ -45,15 +45,8 @@ USER 0
 # yum clean all && rm -rf /var/yum/cache/* first
 RUN yum clean all && rm -rf /var/cache/yum/* \
  && yum -y update \ 
- && yum install -y python36-devel gcc libffi-devel
-
-# ubi7
-RUN if $(cat /etc/redhat-release | grep --quiet 'release 7'); then (yum install -y python36-pip || true); fi
-# ubi8
-RUN if $(cat /etc/redhat-release | grep --quiet 'release 8'); then (yum install -y python3-pip || true); fi
-
+ && yum install -y python36-devel gcc libffi-devel python3-pip
 RUN pip3 install --user molecule==2.22
-
 ARG NAMESPACEDMAN
 ADD $NAMESPACEDMAN /namespaced.yaml
 ADD build/test-framework/ansible-test.sh /ansible-test.sh