[FIX] install.sh: Fix issue pypa/pip#5247

There are error installing package using pip10 because is not possible uninstall packages.

install.sh

@@ -18,8 +18,10 @@ apt-get install -y python-pip python3-pip libxml2-dev libxslt-dev libevent-dev \
 useradd -d /home/${USER} -m -s /bin/bash -p ${USER}pwd ${USER}
 
 # Upgrade python package manager pip
-pip install -U pip
-pip3 install -U pip
+pip install -U --force-reinstall pip==9.0.3
+pip3 install -U --force-reinstall pip==9.0.3
+
+
 
 # Configure locales to avoid coding errors
 echo "en_US.UTF-8 UTF-8" > /etc/locale.gen
@@ -44,10 +46,10 @@ su - ${USER} -c "git config --global http.sslverify false"
 su - ${USER} -c "git clone --single-branch --depth=10 https://github.com/odoo/odoo.git -b 11.0 odoo-repo"
 
 # Install odoo dependencies for py2 and py3
-LC_ALL=C.UTF-8 LANG=C.UTF-8 python3.5 -m pip install -Ur /home/${USER}/odoo-repo/requirements.txt
+LC_ALL=C.UTF-8 LANG=C.UTF-8 python3.5 -m pip install --disable-pip-version-check -Ur /home/${USER}/odoo-repo/requirements.txt
 
 wget https://raw.githubusercontent.com/odoo/odoo/10.0/requirements.txt -O /tmp/req10.txt
-python2.7 -m pip install -Ur /tmp/req10.txt
+python2.7 -m pip install --disable-pip-version-check -Ur /tmp/req10.txt
 rm /tmp/req10.txt
 
 apt-get install -y npm
@@ -56,8 +58,8 @@ npm install -g less
 (cd /usr/bin && wget -qO- -t 1 --timeout=240 https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.4/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz | tar -xJ --strip-components=2 wkhtmltox/bin/wkhtmltopdf)
 
 # Install python tools
-python2.7 -m pip install -U bpython
-python3.5 -m pip install -U bpython
+python2.7 -m pip install --disable-pip-version-check -U bpython
+python3.5 -m pip install --disable-pip-version-check -U bpython
 
 # configure vim IDE
 git clone --depth=1 --single-branch https://github.com/spf13/spf13-vim.git /tmp/spf13-vim