Review sample password usage

Author: cjbj

INSTALL.md

@@ -396,7 +396,7 @@ environment, for example:
 ```
 module.exports = {
   user          : "hr",
-  password      : "welcome",
+  password      : process.env.NODE_ORACLEDB_PASSWORD,
   connectString : "localhost/XEPDB1"
 };
 ```
@@ -531,7 +531,7 @@ environment, for example:
 ```
 module.exports = {
   user          : "hr",
-  password      : "welcome",
+  password      : process.env.NODE_ORACLEDB_PASSWORD,
   connectString : "localhost/XEPDB1"
 };
 ```
@@ -643,7 +643,7 @@ environment, for example:
 ```
 module.exports = {
   user          : "hr",
-  password      : "welcome",
+  password      : process.env.NODE_ORACLEDB_PASSWORD,
   connectString : "localhost/XEPDB1"
 };
 ```
@@ -759,7 +759,7 @@ environment, for example:
 ```
 module.exports = {
   user          : "hr",
-  password      : "welcome",
+  password      : process.env.NODE_ORACLEDB_PASSWORD,
   connectString : "localhost/XEPDB1"
 };
 ```
@@ -883,7 +883,7 @@ environment, for example:
 ```
 module.exports = {
   user          : "hr",
-  password      : "welcome",
+  password      : process.env.NODE_ORACLEDB_PASSWORD,
   connectString : "localhost/XEPDB1"
 };
 ```
@@ -969,7 +969,7 @@ environment, for example:
 ```
 module.exports = {
   user          : "hr",
-  password      : "welcome",
+  password      : process.env.NODE_ORACLEDB_PASSWORD,
   connectString : "localhost/XEPDB1"
 };
 ```
@@ -1091,7 +1091,7 @@ environment, for example:
 ```
 module.exports = {
   user          : "hr",
-  password      : "welcome",
+  password      : process.env.NODE_ORACLEDB_PASSWORD,
   connectString : "localhost/XEPDB1"
 };
 ```
@@ -1210,7 +1210,7 @@ environment, for example:
 ```
 module.exports = {
   user          : "hr",
-  password      : "welcome",
+  password      : process.env.NODE_ORACLEDB_PASSWORD,
   connectString : "localhost/XEPDB1"
 };
 ```