readme: update package names in installation steps (FIXME)

Part of #5562

Author: ligurio

README.FreeBSD

@@ -16,18 +16,18 @@ git submodule update --init --recursive
 cmake .. -DCMAKE_BUILD_TYPE=RelWithDebInfo
 gmake
 
-3. Set up python 2.7
+3. Set up python 3.x
 -------------
 
 Install testing dependences either from packages or from pip.
 
 3.1. From packages:
 -------------
-pkg install python27 py27-yaml py27-daemon py27-msgpack
+pkg install python37 py37-yaml py37-daemon py37-msgpack
 
 3.2. From pip:
 -------------
-pkg install py27-virtualenv
+pkg install py37-virtualenv
 virtualenv .venv
 source .venv/bin/activate
 pip install -r ../test-run/requirements.txt

README.MacOSX

@@ -24,7 +24,7 @@ brew install cmake readline icu4c openssl
 For MacPorts:
 port install autoconf binutils cmake ncurses zlib readline
 
-2. Install test-required packages and modules for Python 2.7
+2. Install test-required packages and modules for Python 3.x
 -------------
 
 You need: pyYAML, python-daemon, msgpack-python, gevent, six

README.OpenBSD

@@ -17,14 +17,14 @@ mkdir build && cd build
 cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -DENABLE_BUNDLED_LIBCURL=OFF ..
 gmake -j
 
-3. Set up python 2.7
+3. Set up python 3.x
 --------------------
 
 Install testing dependences either from packages or from pip.
 
 3.1. From packages:
 -------------------
-pkg_add python-2.7.16 py-gevent py-yaml py-msgpack
+pkg_add python-3.6.7 py-gevent py-yaml py-msgpack
 
 3.2. From pip:
 --------------

static-build/README.md

@@ -19,7 +19,7 @@ be necessary for building and testing:
 
   Python interpreter is not necessary for building Tarantool itself, unless you
   intend to use the “Run the test suite". For all platforms, this is python
-  version 2.7+ (but not 3.x). You need the following Python modules:
+  version 3.x. You need the following Python modules:
   * pyyaml
   * argparse
   * msgpack-python
@@ -33,16 +33,16 @@ CentOS:
 ```bash
 yum install -y \
     git perl gcc cmake make gcc-c++ libstdc++-static autoconf automake libtool \
-    python-msgpack python-yaml python-argparse python-six python-gevent
+    python3-msgpack python3-yaml python-argparse python3-six python3-gevent
 ```
 
 Ubuntu/Debian:
 
 ```bash
 apt-get install -y \
     build-essential cmake make coreutils autoconf automake libtool sed \
-    python python-pip python-setuptools python-dev \
-    python-msgpack python-yaml python-argparse python-six python-gevent
+    python3 python3-pip python3-setuptools python3-dev \
+    python3-msgpack python3-yaml python-argparse python3-six python3-gevent
 ```
 
 MacOS:
@@ -60,8 +60,8 @@ Install brew using command from
 After that run next script:
 
 ```bash
-brew install autoconf automake libtool cmake file://$${PWD}/tools/brew_taps/tntpython2.rbs
-pip install --force-reinstall -r test-run/requirements.txt
+brew install autoconf automake libtool cmake
+pip install --user --force-reinstall -r test-run/requirements.txt
 ```
 
 ## Usage