Renamed the isElementVisible() method on the parent Page object

modified:   src/main/java/com/ekpo/june/automation/page/ControlPanelPage.java
modified:   src/main/java/com/ekpo/june/automation/page/LoginPage.java
modified:   src/main/java/com/ekpo/june/automation/page/Page.java
modified:   src/test/java/com/ekpo/june/automation/test/SmartPageObjectsLoginPage.java