Use "amp &"; (ampersand) in environment variables of oc start-build in OpenShift 4

Issue

• Using oc start-build with environment variables that contains '&' will be encoded to \u0026

      $ oc start-build ruby-hello --follow  --env=ARTIFACT_URL='http://some.url.com/with?query=params&second=param'
  
      build.build.openshift.io/ruby-hello-4 started
      Adding cluster TLS certificate authority to trust store
      Cloning "https://github.com/openshift/ruby-hello-world" ...
          Commit:    0c607af092aa3d4d8769612faa395b2d1020c8e2 (Merge pull request #125 from multi-arch/master)
          Author:    Ben Parees <bparees@users.noreply.github.com>
          Date:    Mon Jun 14 20:43:14 2021 -0400
      Adding cluster TLS certificate authority to trust store
      Replaced Dockerfile FROM image registry.access.redhat.com/ubi8/ruby-27
      Adding cluster TLS certificate authority to trust store
      Caching blobs under "/var/cache/blobs".
  
      Pulling image registry.access.redhat.com/ubi8/ruby-27@sha256:2d92e444fa2a2fcee32500a0327f67b35201001f45a23492f2b57e13a149af7c ...
      Getting image source signatures
      Copying blob sha256:63f9f4c31162a6a5dacd999a0dc65007e15b2ca6b2d9360a1234c27de12e7f38
      Copying blob sha256:ce3c6836540f978b55c511d236429e26b7a45f5a6f1204ab8d4378afaf77332f
      Copying blob sha256:d49355ce848e2c86326ad8d7c3e4905e2883c89e1f6b79553427f1acf21ea7d1
      Copying blob sha256:baeb54a6356aad706951510560f86dc0e36418bf049450d979e4ddf1d0fbbe14
      Copying blob sha256:0fc972655972b3a911d7d9adf0faacb870f7989f9129ff37569d96ca82c1ee8b
      Copying config sha256:3f8815c36c0a69f38baa53359ada1b773229925624f826893fc691bfdce3a6cf
      Writing manifest to image destination
      Storing signatures
      STEP 1: FROM registry.access.redhat.com/ubi8/ruby-27@sha256:2d92e444fa2a2fcee32500a0327f67b35201001f45a23492f2b57e13a149af7c
      STEP 2: ENV "ARTIFACT_URL"="http://some.url.com/with?query=params\u0026second=param"
      --> a6231e824c7
      STEP 3: USER default
      --> 78b1ed51992
      ...