Updating Readme (#206)

Summary:
Pull Request resolved: #206

Updating README for spark when downloading data set and adding packaging as a requirement for DC Perf

Reviewed By: excelle08

Differential Revision: D80749897

fbshipit-source-id: 6da2191018446e87a46924994467588bb9f26520

Author: ahmadelyoussef

README.md

@@ -289,7 +289,7 @@ The commands are:
 ```bash
 dnf install -y python38 python38-pip git
 alternatives --set python3 /usr/bin/python3.8
-pip-3.8 install click pyyaml tabulate pandas
+pip-3.8 install click pyyaml tabulate pandas packaging
 ```
 
 Enable EPEL and PowerTools repos:
@@ -321,7 +321,7 @@ Install git, click, pyyaml and tabulate using DNF, then install Pandas with pip:
 
 ```bash
 dnf install -y git python3-click python3-pyyaml python3-tabulate python3-pip xz-devel
-pip-3.9 install pandas
+pip-3.9 install pandas packaging
 ```
 
 Enable EPEL and PowerTools/CRB repos:
@@ -338,7 +338,7 @@ Install git, pip, then install click, pyyaml, tabulate and pandas:
 ```bash
 sudo apt update
 sudo apt install -y python3-pip git
-sudo pip3 install click pyyaml tabulate pandas
+sudo pip3 install click pyyaml tabulate pandas packaging
 ```
 
 ### Using Benchpress

packages/spark_standalone/README.md

@@ -330,6 +330,7 @@ to access the data in it. Below lists the steps to download the dataset:
   git lfs track
   git lfs fetch
   ```
+  if `git lfs fetch` doesn't work, please try `git lfs checkout`
 - Copy the dataset folder `bpc_t93586_s2_synthetic`:
   ```
   cp -r DCPerf-datasets/bpc_t93586_s2_synthetic /flash23/