Revert python-tackerclient installation

This update is to revert a previous temporary fix for a problem of
tackerclient installation via pip while running function tests.

Signed-off-by: Yasufumi Ogawa <yasufum.o@gmail.com>
Change-Id: I0d1e18c5a40449a9a5bd2eefb58f97c596a1cbab

devstack/lib/tacker

@@ -466,10 +466,6 @@ function tacker_setup_default_vim_resources {
     echo "The content of VIM config file $VIM_CONFIG_FILE :"
     cat $VIM_CONFIG_FILE
 
-    # TODO(tpatil): Remove installing python-tackerclient using pip once
-    # a solution is available to install it using requirements.
-    pip_install python-tackerclient
-
     echo "Set up target openstack vim resources ..."
     openstack --os-cloud=devstack-admin quota set \
               --class --instances -1 --cores -1 --ram -1 default

requirements.txt

@@ -18,8 +18,6 @@ kombu>=4.3.0 # BSD
 netaddr>=0.7.18 # BSD
 SQLAlchemy>=1.3.11 # MIT
 WebOb>=1.7.1 # MIT
-python-heatclient>=1.10.0 # Apache-2.0
-python-keystoneclient>=3.8.0 # Apache-2.0
 alembic>=0.9.6 # MIT
 stevedore>=3.3.0 # Apache-2.0
 oslo.concurrency>=3.26.0 # Apache-2.0
@@ -39,14 +37,17 @@ oslo.upgradecheck>=1.3.0 # Apache-2.0
 oslo.utils>=4.8.0 # Apache-2.0
 oslo.versionedobjects>=1.33.3 # Apache-2.0
 openstacksdk>=0.44.0 # Apache-2.0
+python-barbicanclient>=4.5.2 # Apache-2.0
+python-heatclient>=1.10.0 # Apache-2.0
+python-keystoneclient>=3.8.0 # Apache-2.0
+python-mistralclient>=4.2.0 # Apache-2.0
 python-neutronclient>=6.7.0 # Apache-2.0
 python-novaclient>=9.1.0 # Apache-2.0
+python-tackerclient>=1.11.0 # Apache-2.0
 rfc3986>=1.2.0 # Apache-2.0
 cryptography>=2.7 # BSD/Apache-2.0
 paramiko>=2.7.1 # LGPLv2.1+
 pyroute2>=0.4.21;sys_platform!='win32' # Apache-2.0 (+ dual licensed GPL2)
-python-mistralclient>=4.2.0 # Apache-2.0
-python-barbicanclient>=4.5.2 # Apache-2.0
 castellan>=0.16.0 # Apache-2.0
 kubernetes>=18.20.0 # Apache-2.0
 setuptools!=24.0.0,!=34.0.0,!=34.0.1,!=34.0.2,!=34.0.3,!=34.1.0,!=34.1.1,!=34.2.0,!=34.3.0,!=34.3.1,!=34.3.2,!=36.2.0,>=21.0.0 # PSF/ZPL