LIBDRUM-137. Home Page: Internal error displays

1. Added dependency to the parent pom and dspace-jspui pom to compile Community class

 <dependency>
			<groupId>javax.servlet.jsp</groupId>
			<artifactId>javax.servlet.jsp-api</artifactId>
			<version>2.2.1</version>
			<scope>provided</scope>
</dependency>

2. The dependency should not be in WEB-INF/lib otherwise container would throw am exception due to jars conflicts.

https://issues.umd.edu/browse/LIBDRUM-137