Add back Java memory options to prevent build failure on Travis
Add back Java memory options to prevent build failure on Travis

JBYoshi/SpongeAPI,AlphaModder/SpongeAPI,kashike/SpongeAPI,SpongePowered/SpongeAPI,JBYoshi/SpongeAPI,AlphaModder/SpongeAPI,boomboompower/SpongeAPI,ryantheleach/SpongeAPI,ryantheleach/SpongeAPI,DDoS/SpongeAPI,SpongePowered/SpongeAPI,modwizcode/SpongeAPI,modwizcode/SpongeAPI,boomboompower/SpongeAPI,SpongePowered/SpongeAPI,DDoS/SpongeAPI,kashike/SpongeAPI