Redirection (<, <<) do not work in CLI

Description of problem:
Redirection (<, <<) do not work in CLI

How reproducible:
Always

Steps to Reproduce:

1. echo ":shutdown" > c
2. ./jboss-cli.sh -c < c

Actual results:
You are disconnected at the moment. Type 'connect' to connect to the server or 'help' for the list of supported commands.

Expected results:
":shutdown" command will be executed

Another steps to reproduce:

1. cd bin
2. ./standalone.sh &
3. ./jboss-cli.sh -c command=/core-service=management/security-realm=ApplicationRealm/authentication=local:remove
4. ./jboss-cli.sh -c command=/core-service=management/security-realm=ManagementRealm/authentication=local:remove
5. ./jboss-cli.sh -c command=:shutdown
6. ./add-user.sh -u bob -p admin123$ -s
7. ./standalone.sh &

8. ./jboss-cli.sh -c <<EOF
   bob
   admin123$
   batch
   :shutdown
   run-batch
   EOF

Actual results:
Unexpected command 'bob'. Type 'help --commands' for the list of supported commands.

Expected results:
":shutdown" command will be executed

Additional info:
Regression against 6.4.0
Regression against 7.0.0.DR7
Bugzilla from 6x

• https://bugzilla.redhat.com/show_bug.cgi?id=961425

Customer cases (EAP 6x):

• https://access.redhat.com/support/cases/#/case/00904577
• https://access.redhat.com/support/cases/#/case/00889193
• https://access.redhat.com/support/cases/#/case/00910827
• https://access.redhat.com/support/cases/#/case/00910848